1 00:00:01,350 --> 00:00:05,280 [Music] 2 00:00:11,490 --> 00:00:09,990 I thinks the introduction see I'm a 3 00:00:12,930 --> 00:00:11,500 winking fellow at the University of 4 00:00:15,179 --> 00:00:12,940 Warwick so I feel like I just need one 5 00:00:16,470 --> 00:00:15,189 more stylized w like a symbol at the 6 00:00:17,250 --> 00:00:16,480 bottom of my screen that so I'm working 7 00:00:18,990 --> 00:00:17,260 on it 8 00:00:20,279 --> 00:00:19,000 see I'm talking today about the climate 9 00:00:23,850 --> 00:00:20,289 mapping of exoplanet work I've been 10 00:00:24,840 --> 00:00:23,860 doing so I want to start off with a nice 11 00:00:26,189 --> 00:00:24,850 picture of Jupiter 12 00:00:27,450 --> 00:00:26,199 although not quite as nice as some of 13 00:00:29,340 --> 00:00:27,460 the ones we saw this morning those a 14 00:00:31,590 --> 00:00:29,350 really brilliant update these two this 15 00:00:32,790 --> 00:00:31,600 talk a little bit no reason I'm starting 16 00:00:35,910 --> 00:00:32,800 here is because you can see to you but 17 00:00:37,559 --> 00:00:35,920 there is a dynamic and interesting and 18 00:00:39,930 --> 00:00:37,569 very variable object across the whole of 19 00:00:42,419 --> 00:00:39,940 the disk and there if when independent 20 00:00:44,309 --> 00:00:42,429 cloud formations and dynamics going on 21 00:00:47,669 --> 00:00:44,319 that really the point I'm trying to make 22 00:00:49,439 --> 00:00:47,679 is that planets are not points so why do 23 00:00:53,389 --> 00:00:49,449 we treat them in X upon us as if they 24 00:00:55,439 --> 00:00:53,399 are we quite often talk about a singular 25 00:00:58,349 --> 00:00:55,449 equilibrium temperature for a planet a 26 00:01:01,079 --> 00:00:58,359 singular abundance of a certain element 27 00:01:02,430 --> 00:01:01,089 and really it doesn't make sense to talk 28 00:01:03,989 --> 00:01:02,440 about finances points because they are 29 00:01:07,289 --> 00:01:03,999 of course like dynamic and interesting 30 00:01:09,390 --> 00:01:07,299 objects just like you did on one way the 31 00:01:10,860 --> 00:01:09,400 planets are not one-dimensional is in 32 00:01:12,810 --> 00:01:10,870 their velocity field so I've just 33 00:01:16,770 --> 00:01:12,820 brought up a plot from showman at bell 34 00:01:18,480 --> 00:01:16,780 2012 which shows this is a planet of 35 00:01:20,130 --> 00:01:18,490 looking in is a trend looking in on a 36 00:01:21,750 --> 00:01:20,140 planet as it transits or the expanded 37 00:01:23,490 --> 00:01:21,760 out the atmosphere so this is how the 38 00:01:24,960 --> 00:01:23,500 velocity field of the planet's 39 00:01:26,070 --> 00:01:24,970 atmosphere would look to an observer in 40 00:01:28,650 --> 00:01:26,080 here so you can see you've got this 41 00:01:30,390 --> 00:01:28,660 classic equatorial jet and also some 42 00:01:31,740 --> 00:01:30,400 polar flow coming towards you as well so 43 00:01:34,500 --> 00:01:31,750 there's this large blue ship coming 44 00:01:36,860 --> 00:01:34,510 towards you so planets are certainly not 45 00:01:39,450 --> 00:01:36,870 one-dimensional in their velocity field 46 00:01:41,040 --> 00:01:39,460 and there's a lot more you can get out 47 00:01:42,840 --> 00:01:41,050 of these predictions from these models 48 00:01:44,160 --> 00:01:42,850 and I feel like this talk is called 49 00:01:45,630 --> 00:01:44,170 place now because you just had an hour 50 00:01:47,190 --> 00:01:45,640 of hearing about all of this from 51 00:01:48,330 --> 00:01:47,200 remember Lee so that was a really good 52 00:01:51,360 --> 00:01:48,340 introduction for me so thank you very 53 00:01:53,130 --> 00:01:51,370 much so these models predict not a lot 54 00:01:55,410 --> 00:01:53,140 about their dynamics at the planet 55 00:01:57,630 --> 00:01:55,420 atmosphere so they make specific and 56 00:02:00,420 --> 00:01:57,640 testable predictions about the velocity 57 00:02:02,969 --> 00:02:00,430 field and about the presence of clouds 58 00:02:05,430 --> 00:02:02,979 and all sorts of other things but how do 59 00:02:06,630 --> 00:02:05,440 you test this in real life and to do 60 00:02:10,139 --> 00:02:06,640 that you're going to need some form of 61 00:02:13,649 --> 00:02:10,149 spatial resolution so this is why Emily 62 00:02:15,059 --> 00:02:13,659 was talking about the the spatial 63 00:02:16,259 --> 00:02:15,069 scanning during secondary Eclipse that's 64 00:02:19,839 --> 00:02:16,269 one way of doing it 65 00:02:22,030 --> 00:02:19,849 and that you need 66 00:02:24,760 --> 00:02:22,040 you need some way of spatially resolving 67 00:02:26,110 --> 00:02:24,770 the exit point atmosphere and what I 68 00:02:28,240 --> 00:02:26,120 really want to do is do this during 69 00:02:30,070 --> 00:02:28,250 transmission because transmission is 70 00:02:33,309 --> 00:02:30,080 what my specialty is what I'm interested 71 00:02:34,479 --> 00:02:33,319 in so is there a way to break down the 72 00:02:36,550 --> 00:02:34,489 spatial resolution of the planet during 73 00:02:38,770 --> 00:02:36,560 primary transit so as the planet moves 74 00:02:40,720 --> 00:02:38,780 in front of the star so it's gonna spend 75 00:02:46,059 --> 00:02:40,730 a portion of its time with only one limb 76 00:02:48,070 --> 00:02:46,069 in front of the star there's a little 77 00:02:49,420 --> 00:02:48,080 bit of dark maybe you can see this star 78 00:02:50,949 --> 00:02:49,430 in the background there and at the 79 00:02:53,770 --> 00:02:50,959 beginning of the transit the planet is 80 00:02:55,000 --> 00:02:53,780 only one limb is over the star and as 81 00:02:56,559 --> 00:02:55,010 you go food with transit you have a 82 00:02:58,390 --> 00:02:56,569 center where the whole thing is covered 83 00:03:00,250 --> 00:02:58,400 and then the other end of the transit 84 00:03:01,509 --> 00:03:00,260 the other limb of the planet is now 85 00:03:03,490 --> 00:03:01,519 transiting and the other ones off the 86 00:03:05,080 --> 00:03:03,500 star so throughout the transi you're 87 00:03:07,150 --> 00:03:05,090 gonna have a differential weighting of 88 00:03:09,640 --> 00:03:07,160 what parts of the planet atmosphere of 89 00:03:12,100 --> 00:03:09,650 being having your transmission spectrum 90 00:03:14,170 --> 00:03:12,110 from as a function of time so can you 91 00:03:17,830 --> 00:03:14,180 use this to probe the two limbs 92 00:03:19,410 --> 00:03:17,840 independently so there's a problem of 93 00:03:21,610 --> 00:03:19,420 course there always is I mean 94 00:03:24,280 --> 00:03:21,620 spectroscopy is complicated and 95 00:03:26,440 --> 00:03:24,290 difficult and you've got the you've got 96 00:03:28,180 --> 00:03:26,450 issues with the velocity field of 97 00:03:29,979 --> 00:03:28,190 everything else in the system so the 98 00:03:31,150 --> 00:03:29,989 planet is moving the earth is moving 99 00:03:32,979 --> 00:03:31,160 with respect to the planet you're 100 00:03:35,140 --> 00:03:32,989 looking at and the star itself is 101 00:03:37,360 --> 00:03:35,150 rotating so this is the rasta McLoughlin 102 00:03:38,949 --> 00:03:37,370 effect where the velocity of the star 103 00:03:41,710 --> 00:03:38,959 they are passing over as a function of 104 00:03:43,270 --> 00:03:41,720 time is changing so this can contaminate 105 00:03:44,319 --> 00:03:43,280 your transmission spectrum so it's 106 00:03:45,640 --> 00:03:44,329 something that you have to take into 107 00:03:47,140 --> 00:03:45,650 account 108 00:03:48,729 --> 00:03:47,150 there's absorption in the Earth's 109 00:03:50,349 --> 00:03:48,739 atmosphere of course so for example if 110 00:03:51,849 --> 00:03:50,359 you're looking at sodium like I like I 111 00:03:53,560 --> 00:03:51,859 will be the Earth's atmosphere has 112 00:03:55,810 --> 00:03:53,570 sodium as well and it also has water 113 00:03:57,220 --> 00:03:55,820 features near the sodium feature so you 114 00:03:58,150 --> 00:03:57,230 have to take into account the the 115 00:04:03,130 --> 00:03:58,160 transmission of the Earth's atmosphere 116 00:04:05,020 --> 00:04:03,140 but luckily the solution is it is high 117 00:04:05,710 --> 00:04:05,030 resolution spectroscopy so because 118 00:04:08,199 --> 00:04:05,720 you've got all of these different 119 00:04:10,479 --> 00:04:08,209 velocities if you look at it with a high 120 00:04:13,090 --> 00:04:10,489 enough resolution spectrograph then the 121 00:04:15,610 --> 00:04:13,100 the velocities all separate out the 122 00:04:17,319 --> 00:04:15,620 features and the changes in time so pre 123 00:04:18,699 --> 00:04:17,329 how the features and you can quite 124 00:04:19,990 --> 00:04:18,709 easily separate out the bits they are 125 00:04:21,699 --> 00:04:20,000 interested in the bits the annoying 126 00:04:25,779 --> 00:04:21,709 trusted him but you have to take care of 127 00:04:27,159 --> 00:04:25,789 the model incorrectly so I did a study 128 00:04:30,010 --> 00:04:27,169 on history one eight nine seven pre 129 00:04:32,140 --> 00:04:30,020 freebie a couple years back and so this 130 00:04:33,010 --> 00:04:32,150 was to see if this technique was viable 131 00:04:34,720 --> 00:04:33,020 whether you 132 00:04:39,040 --> 00:04:34,730 scan the limb of the planet as it 133 00:04:40,660 --> 00:04:39,050 transits so I am taking me all of these 134 00:04:42,280 --> 00:04:40,670 things into account it was possible that 135 00:04:44,410 --> 00:04:42,290 you could separate out the eastern and 136 00:04:45,910 --> 00:04:44,420 western limb contributions and I was 137 00:04:48,550 --> 00:04:45,920 looking specifically if the absorption 138 00:04:50,920 --> 00:04:48,560 from sodium and seeing how the velocity 139 00:04:53,530 --> 00:04:50,930 of this absorbed sodium line changes as 140 00:04:55,930 --> 00:04:53,540 a function of time and I found that you 141 00:04:57,460 --> 00:04:55,940 could separate out their velocity from 142 00:04:59,590 --> 00:04:57,470 the eastern and western limbs to 143 00:05:01,480 --> 00:04:59,600 actually you find on the trailing or 144 00:05:03,310 --> 00:05:01,490 western limb you have a lot a of about 145 00:05:06,490 --> 00:05:03,320 500 meters per second coming towards you 146 00:05:08,740 --> 00:05:06,500 and on the other side 2 kilometers per 147 00:05:10,780 --> 00:05:08,750 second going away so you have this this 148 00:05:13,660 --> 00:05:10,790 rotation of the planet and eastward just 149 00:05:15,400 --> 00:05:13,670 as predicted in the models that if you 150 00:05:17,170 --> 00:05:15,410 average that out to bring it down to one 151 00:05:18,940 --> 00:05:17,180 dimensional point again you get an 152 00:05:21,880 --> 00:05:18,950 average of a two kilometer blue shift 153 00:05:23,830 --> 00:05:21,890 and this is very similar to what's now 154 00:05:26,230 --> 00:05:23,840 that's now found in 2010 when they 155 00:05:28,240 --> 00:05:26,240 looked at 82 or nine four five maybe now 156 00:05:29,800 --> 00:05:28,250 they didn't spectrally resolve it like I 157 00:05:32,050 --> 00:05:29,810 did they just looked at this singular 158 00:05:33,850 --> 00:05:32,060 one dimensional point and they got minus 159 00:05:36,700 --> 00:05:33,860 two kilometers per second so it looks 160 00:05:38,290 --> 00:05:36,710 like you can this two point of the 161 00:05:39,670 --> 00:05:38,300 second if you break it out you start 162 00:05:47,080 --> 00:05:39,680 seeing this equatorial jet and the 163 00:05:48,909 --> 00:05:47,090 sexual rotation and this is a very close 164 00:05:50,800 --> 00:05:48,919 map to the kind of velocities and also 165 00:05:53,250 --> 00:05:50,810 the asymmetry in the velocities that 166 00:05:56,409 --> 00:05:53,260 were expected from theory so this is a 167 00:05:57,460 --> 00:05:56,419 bottom that thing is gone at the bottom 168 00:06:01,870 --> 00:05:57,470 there's another clock from German I 169 00:06:03,580 --> 00:06:01,880 think so the velocity signal is is 170 00:06:05,080 --> 00:06:03,590 higher in the blue shift because you've 171 00:06:08,200 --> 00:06:05,090 also got this polar region coming 172 00:06:11,110 --> 00:06:08,210 towards you as well so where to go next 173 00:06:13,480 --> 00:06:11,120 from here so I've known now from this 174 00:06:15,790 --> 00:06:13,490 technique works and I want to extend 175 00:06:18,690 --> 00:06:15,800 this analysis to more hot Jupiters also 176 00:06:20,770 --> 00:06:18,700 to search for trends in wind velocity 177 00:06:22,630 --> 00:06:20,780 increase the spatial resolution a little 178 00:06:25,450 --> 00:06:22,640 further and expand from certain to over 179 00:06:27,550 --> 00:06:25,460 absorbers and also one thing that really 180 00:06:29,740 --> 00:06:27,560 bugged me the last time around is my 181 00:06:31,719 --> 00:06:29,750 plots apparently weren't very photogenic 182 00:06:33,790 --> 00:06:31,729 for pleasing to some of the press 183 00:06:36,370 --> 00:06:33,800 releases and I got this wonderful quote 184 00:06:38,780 --> 00:06:36,380 from the register that my graphics were 185 00:06:40,610 --> 00:06:38,790 charmingly crew 186 00:06:43,610 --> 00:06:40,620 so that's kind of bugged me for years 187 00:06:44,870 --> 00:06:43,620 and I okay I just want to I want to 188 00:06:46,940 --> 00:06:44,880 correct the record and make some 189 00:06:52,760 --> 00:06:46,950 nice-looking plots to demonstrate this 190 00:06:53,990 --> 00:06:52,770 effect in the future so the base but I'm 191 00:06:55,670 --> 00:06:54,000 going to use to do this with is 192 00:06:57,470 --> 00:06:55,680 spider-man so some of you may have heard 193 00:07:00,320 --> 00:06:57,480 of this this is the previous project I 194 00:07:02,840 --> 00:07:00,330 worked on it's for mapping mapping 195 00:07:05,030 --> 00:07:02,850 exoplanets during phase curve and and 196 00:07:07,310 --> 00:07:05,040 transit lands and secondary flip 197 00:07:08,960 --> 00:07:07,320 scanning if I think I should get some 198 00:07:11,510 --> 00:07:08,970 sort of award for the most convoluted 199 00:07:12,830 --> 00:07:11,520 acronym ever all backronym where I'll be 200 00:07:14,960 --> 00:07:12,840 you can just sort of see it over top 201 00:07:17,300 --> 00:07:14,970 there so it's the secondary Eclipse and 202 00:07:21,680 --> 00:07:17,310 phase of integrated booty temperature 203 00:07:22,970 --> 00:07:21,690 mapping just about works so spider-man 204 00:07:24,380 --> 00:07:22,980 is the base but I did get into a little 205 00:07:25,400 --> 00:07:24,390 bit of issues with the editor of the 206 00:07:27,409 --> 00:07:25,410 journal where they were worried that 207 00:07:29,930 --> 00:07:27,419 there might be a copyright claim for 208 00:07:31,550 --> 00:07:29,940 Marvel so far okay so my next project 209 00:07:33,170 --> 00:07:31,560 I'm looking now at transmission 210 00:07:34,850 --> 00:07:33,180 spectroscopy I should be a bit more 211 00:07:36,860 --> 00:07:34,860 careful with my name selection so I 212 00:07:40,310 --> 00:07:36,870 thought you know the dividing line 213 00:07:43,540 --> 00:07:40,320 between the light and dark that's that's 214 00:07:46,250 --> 00:07:43,550 a good start so that is the Terminator 215 00:07:47,870 --> 00:07:46,260 there's no way that anyone is going to 216 00:07:50,510 --> 00:07:47,880 get this confuse of any sort of cultural 217 00:07:52,600 --> 00:07:50,520 reference so I don't have to worry about 218 00:07:56,150 --> 00:07:52,610 getting in trouble 219 00:07:57,710 --> 00:07:56,160 anyway so yeah the basic outline of the 220 00:08:00,380 --> 00:07:57,720 code is it works in the same way that 221 00:08:02,779 --> 00:08:00,390 spider-man death which is an analytical 222 00:08:04,940 --> 00:08:02,789 with geometric integrate there so but it 223 00:08:08,150 --> 00:08:04,950 simply the planet that you're looking at 224 00:08:13,340 --> 00:08:08,160 is split out into a small mm-hmm into a 225 00:08:14,900 --> 00:08:13,350 small number of a segments and then you 226 00:08:18,080 --> 00:08:14,910 go through and you see as a function of 227 00:08:19,790 --> 00:08:18,090 time what portion of the segment is 228 00:08:21,500 --> 00:08:19,800 covered up by the star and you can 229 00:08:22,700 --> 00:08:21,510 calculate this exactly and analytically 230 00:08:24,050 --> 00:08:22,710 so it means you can make the code very 231 00:08:26,120 --> 00:08:24,060 fast which means that you can do 232 00:08:27,529 --> 00:08:26,130 retrievals with it so in this example in 233 00:08:30,140 --> 00:08:27,539 the top right K you see the planet is 234 00:08:32,089 --> 00:08:30,150 represented by this orange disc and the 235 00:08:34,579 --> 00:08:32,099 star is a blue disc and then in you've 236 00:08:36,740 --> 00:08:34,589 got these exact geometric shapes that I 237 00:08:40,130 --> 00:08:36,750 mark down between you can calculate the 238 00:08:42,829 --> 00:08:40,140 area's very quickly so in terminator you 239 00:08:44,089 --> 00:08:42,839 can you can set up the phlume 240 00:08:46,460 --> 00:08:44,099 architecture however you like 241 00:08:48,850 --> 00:08:46,470 so here i have an example of jupiter 242 00:08:51,170 --> 00:08:48,860 where i've split up so you have these 243 00:08:51,570 --> 00:08:51,180 enhanced velocity regions around the 244 00:08:53,730 --> 00:08:51,580 attack 245 00:08:56,910 --> 00:08:53,740 toriel yet and then the rest of the 246 00:08:58,860 --> 00:08:56,920 planet is represented by two polar 247 00:09:00,180 --> 00:08:58,870 regions so you can set up however you 248 00:09:01,860 --> 00:09:00,190 like and you can put different velocity 249 00:09:05,220 --> 00:09:01,870 fields in these sections for broadening 250 00:09:07,470 --> 00:09:05,230 the via the transmission spectrum how do 251 00:09:09,540 --> 00:09:07,480 you like of course you've got to worry 252 00:09:12,510 --> 00:09:09,550 about the star so the limb darken has to 253 00:09:14,280 --> 00:09:12,520 be taken into account so I have a I have 254 00:09:17,240 --> 00:09:14,290 a full stellar model underneath that the 255 00:09:20,130 --> 00:09:17,250 transit spectrum so you can correctly 256 00:09:21,360 --> 00:09:20,140 calculate the effects of the star this 257 00:09:23,130 --> 00:09:21,370 also means that you take into account 258 00:09:25,680 --> 00:09:23,140 things like the center to limb variation 259 00:09:30,120 --> 00:09:25,690 in stellar lines so you have this issue 260 00:09:32,550 --> 00:09:30,130 where where the trans musician where the 261 00:09:34,590 --> 00:09:32,560 limb darkening changes as you go through 262 00:09:35,490 --> 00:09:34,600 a spectral line so the limb darkening in 263 00:09:36,750 --> 00:09:35,500 the middle of the spectral line is 264 00:09:39,600 --> 00:09:36,760 different to the limb darkening outside 265 00:09:41,520 --> 00:09:39,610 the spectral line so if you have a if 266 00:09:43,230 --> 00:09:41,530 you have a planet moving with a 267 00:09:45,390 --> 00:09:43,240 differential velocity and it goes 268 00:09:46,890 --> 00:09:45,400 basically the limb darkening that it's 269 00:09:48,300 --> 00:09:46,900 experiencing changes as a function of 270 00:09:50,760 --> 00:09:48,310 time so you have to take that into 271 00:09:52,500 --> 00:09:50,770 account and it looks people to go the 272 00:09:54,060 --> 00:09:52,510 rest of McLoughlin effect so the star 273 00:09:57,360 --> 00:09:54,070 enemy has a velocity field have had it 274 00:09:59,790 --> 00:09:57,370 as well so people all this together I've 275 00:10:02,790 --> 00:09:59,800 got a short movie here you can see the 276 00:10:05,490 --> 00:10:02,800 planet moving in both the input velocity 277 00:10:07,260 --> 00:10:05,500 and flux space and any moment now as it 278 00:10:08,790 --> 00:10:07,270 comes in front of the star you can see 279 00:10:10,770 --> 00:10:08,800 the transmission spectrum on the bottom 280 00:10:13,050 --> 00:10:10,780 left starts to change and you'll start 281 00:10:15,630 --> 00:10:13,060 seeing the sodium feature come in and 282 00:10:17,190 --> 00:10:15,640 then on the VG gets deeper you've got a 283 00:10:18,180 --> 00:10:17,200 contamination from the star and also 284 00:10:20,580 --> 00:10:18,190 from the planet's atmosphere in this 285 00:10:22,890 --> 00:10:20,590 example and then on the right is just a 286 00:10:24,690 --> 00:10:22,900 trail plot so it's showing this in two 287 00:10:27,030 --> 00:10:24,700 dimensions so time is moving from top to 288 00:10:29,580 --> 00:10:27,040 bottom so all these effects are taken 289 00:10:33,150 --> 00:10:29,590 into account in the model so I went back 290 00:10:34,650 --> 00:10:33,160 and it worked by analyzing the same 291 00:10:36,510 --> 00:10:34,660 dataset that I did initially in my pilot 292 00:10:39,060 --> 00:10:36,520 study so hey do you wanna nice having 293 00:10:40,350 --> 00:10:39,070 proofread B again now this time all of 294 00:10:42,000 --> 00:10:40,360 the stellar effects are taking properly 295 00:10:44,130 --> 00:10:42,010 into account in ways that they weren't 296 00:10:45,270 --> 00:10:44,140 necessarily the first time around but I 297 00:10:48,060 --> 00:10:45,280 found that this did not significantly 298 00:10:49,920 --> 00:10:48,070 affect my results in this instance so 299 00:10:53,850 --> 00:10:49,930 the velocity stayed pretty similar to 300 00:10:56,430 --> 00:10:53,860 what I reported before so there's a blue 301 00:10:59,220 --> 00:10:56,440 shift coming towards you from the from 302 00:11:01,560 --> 00:10:59,230 the days from the west side and a red 303 00:11:03,390 --> 00:11:01,570 shift moving away on the eastern side so 304 00:11:05,040 --> 00:11:03,400 that's all the same and I'll be 305 00:11:07,140 --> 00:11:05,050 reporting with you 306 00:11:09,570 --> 00:11:07,150 and then I moved on and I want to look 307 00:11:10,770 --> 00:11:09,580 at another planet and I wanted to try 308 00:11:13,200 --> 00:11:10,780 something a bit different as well 309 00:11:14,790 --> 00:11:13,210 so what's 49 B is another good testbed 310 00:11:17,520 --> 00:11:14,800 scenario because it's a but this 311 00:11:19,380 --> 00:11:17,530 enormous extremely deep sodium signal so 312 00:11:21,180 --> 00:11:19,390 I've putted it to scale the bottom left 313 00:11:22,470 --> 00:11:21,190 there you can see the atmosphere which 314 00:11:24,630 --> 00:11:22,480 is highlighted in red and blue for the 315 00:11:26,340 --> 00:11:24,640 velocity field if the radius of the 316 00:11:28,470 --> 00:11:26,350 atmosphere is as big as the radius of 317 00:11:30,090 --> 00:11:28,480 the planet itself so this is an enormous 318 00:11:32,370 --> 00:11:30,100 more like an exosphere really been 319 00:11:35,280 --> 00:11:32,380 announced there so there's this huge big 320 00:11:38,820 --> 00:11:35,290 feature which was reporting wooden back 321 00:11:41,010 --> 00:11:38,830 adele 2017 and so is it possible to not 322 00:11:42,750 --> 00:11:41,020 only separate out the equatorial jet but 323 00:11:45,000 --> 00:11:42,760 also to separate out and get another 324 00:11:46,980 --> 00:11:45,010 sore point in your spatial resolution 325 00:11:50,070 --> 00:11:46,990 and separate out the polar regions from 326 00:11:52,320 --> 00:11:50,080 the equatorial regions so I updated my 327 00:11:54,570 --> 00:11:52,330 model a little bit and so I've now got 328 00:11:57,360 --> 00:11:54,580 three velocities so there's a velocity 329 00:11:58,680 --> 00:11:57,370 for the trailing and leading equatorial 330 00:12:00,720 --> 00:11:58,690 regions of the planet and then a 331 00:12:03,120 --> 00:12:00,730 singular polar velocity which is for the 332 00:12:04,560 --> 00:12:03,130 North and South Poles and I applied this 333 00:12:06,560 --> 00:12:04,570 to the model and I did a Bayesian 334 00:12:08,760 --> 00:12:06,570 retrieval and I found that you get a 335 00:12:10,950 --> 00:12:08,770 significantly improved bit I'm having 336 00:12:12,720 --> 00:12:10,960 this velocity component so now I find 337 00:12:14,310 --> 00:12:12,730 that there in this case there's a 338 00:12:16,050 --> 00:12:14,320 trailing and leading velocity for this 339 00:12:17,700 --> 00:12:16,060 planet of both about four kilometers per 340 00:12:19,500 --> 00:12:17,710 second so moving the way in towards you 341 00:12:22,230 --> 00:12:19,510 you also get this separate blue-shifted 342 00:12:24,000 --> 00:12:22,240 polar region moving towards you at one 343 00:12:25,410 --> 00:12:24,010 kilometer per second and if you remember 344 00:12:26,760 --> 00:12:25,420 back to the beginning where I showed 345 00:12:28,320 --> 00:12:26,770 those plots from the theory papers 346 00:12:29,760 --> 00:12:28,330 that's pretty much exactly what was 347 00:12:32,400 --> 00:12:29,770 expected was that you would have this 348 00:12:34,020 --> 00:12:32,410 polar flow which come which ends up 349 00:12:36,140 --> 00:12:34,030 together with the actual Jets to get 350 00:12:39,600 --> 00:12:36,150 there the full signal together full 351 00:12:41,070 --> 00:12:39,610 velocity space as a function of time so 352 00:12:43,830 --> 00:12:41,080 you can see that it's the model as well 353 00:12:46,650 --> 00:12:43,840 and the bottom left there this is just a 354 00:12:48,600 --> 00:12:46,660 single frame so there are there are 40 355 00:12:50,700 --> 00:12:48,610 individual exposures over three nights 356 00:12:52,620 --> 00:12:50,710 and this data set and you can see that 357 00:12:54,900 --> 00:12:52,630 the sodium signal is visible and well 358 00:12:56,700 --> 00:12:54,910 fitted in in just one of these 40 frames 359 00:12:58,800 --> 00:12:56,710 igg measurement imagine the amount of 360 00:13:00,660 --> 00:12:58,810 extra day to be effectively from doing 361 00:13:04,050 --> 00:13:00,670 this 40 times and that's whether the 362 00:13:05,460 --> 00:13:04,060 power of this fit comes from so to put 363 00:13:08,160 --> 00:13:05,470 this in context I just want to pipe burn 364 00:13:10,080 --> 00:13:08,170 a nice pot from : commissary 2018 so 365 00:13:12,180 --> 00:13:10,090 this is a lot where I want to add more 366 00:13:15,330 --> 00:13:12,190 points to effectively because it's a 367 00:13:17,430 --> 00:13:15,340 it's looking at how the expected 368 00:13:18,689 --> 00:13:17,440 velocity of dekotora changes as a 369 00:13:20,850 --> 00:13:18,699 function of 370 00:13:22,679 --> 00:13:20,860 different drank mechanisms so this is 371 00:13:25,889 --> 00:13:22,689 what Emily was talking about how the the 372 00:13:28,799 --> 00:13:25,899 drag is affecting the velocity VC and 373 00:13:31,889 --> 00:13:28,809 that affects both the offset of hot 374 00:13:34,109 --> 00:13:31,899 spots but also the the boss T's that I 375 00:13:36,090 --> 00:13:34,119 can measure and so I see that in this 376 00:13:38,340 --> 00:13:36,100 case I Cornwall sporty freebie now is a 377 00:13:41,699 --> 00:13:38,350 yellow point and the other two points 378 00:13:44,789 --> 00:13:41,709 are 39 and 189 so that 189 is the one 379 00:13:46,410 --> 00:13:44,799 that I measured earlier so that's only 380 00:13:48,900 --> 00:13:46,420 three points here now I want to add a 381 00:13:50,729 --> 00:13:48,910 few more and that should be able to 382 00:13:52,710 --> 00:13:50,739 really is you imagine putting in more 383 00:13:54,239 --> 00:13:52,720 planets in different different regions 384 00:13:56,160 --> 00:13:54,249 of the parameter space they're going to 385 00:13:57,989 --> 00:13:56,170 be able to distinguish between the shear 386 00:14:00,329 --> 00:13:57,999 and instability model and the magnetars 387 00:14:01,650 --> 00:14:00,339 and the magnetic drag model so this will 388 00:14:03,629 --> 00:14:01,660 really allow you to look at different 389 00:14:06,689 --> 00:14:03,639 physical mechanisms for a dragon next 390 00:14:08,489 --> 00:14:06,699 one atmospheres and finally I just 391 00:14:11,939 --> 00:14:08,499 wanted to do a little advertisement for 392 00:14:13,769 --> 00:14:11,949 Diana so Donna Powell is leading a 393 00:14:14,789 --> 00:14:13,779 project which I've been working on with 394 00:14:18,139 --> 00:14:14,799 her recently 395 00:14:20,699 --> 00:14:18,149 so there's actually this really nice 396 00:14:23,159 --> 00:14:20,709 cloud model farik's of Planet search is 397 00:14:25,319 --> 00:14:23,169 a full micro physical model and she's 398 00:14:28,350 --> 00:14:25,329 done she's resolved around the limb of 399 00:14:29,879 --> 00:14:28,360 the planet their different cloud the 400 00:14:31,710 --> 00:14:29,889 different cloud covering fractions you 401 00:14:32,850 --> 00:14:31,720 get there's a function of Lingle so 402 00:14:36,059 --> 00:14:32,860 you've got this inhomogeneous kiled 403 00:14:38,460 --> 00:14:36,069 model and what I want you to this is to 404 00:14:40,949 --> 00:14:38,470 show how this signal would actually be 405 00:14:44,369 --> 00:14:40,959 observable as a function of time in a 406 00:14:45,840 --> 00:14:44,379 JWT transit so you can use Terminator to 407 00:14:47,189 --> 00:14:45,850 put different amounts of clouds on the 408 00:14:50,669 --> 00:14:47,199 two different sides of the planet coming 409 00:14:53,249 --> 00:14:50,679 from the model and then that if you're a 410 00:14:55,309 --> 00:14:53,259 time variable signal in a JWST transit 411 00:14:57,419 --> 00:14:55,319 which would lie to constantly detect 412 00:14:59,400 --> 00:14:57,429 inhomogeneous clouds but you want to 413 00:15:01,829 --> 00:14:59,410 talk about that more then go speak to 414 00:15:03,509 --> 00:15:01,839 Diana she's got a poster up today or is 415 00:15:05,489 --> 00:15:03,519 it two or is it the next session 416 00:15:07,979 --> 00:15:05,499 tomorrow it'll be up at some point so go 417 00:15:09,569 --> 00:15:07,989 chat to her about this so yeah I will 418 00:15:11,069 --> 00:15:09,579 just leave my conclusions up on the 419 00:15:19,229 --> 00:15:11,079 screen and I'll finish there so thank 420 00:15:25,119 --> 00:15:23,199 thanks so much Tom it's very amazing so 421 00:15:27,460 --> 00:15:25,129 I'm looking at the room for a lot of 422 00:15:32,859 --> 00:15:27,470 funds to raise please raise your hand if 423 00:15:39,129 --> 00:15:32,869 you want to ask questions okay okay show 424 00:15:40,449 --> 00:15:39,139 me share so for what 49 what is the 425 00:15:41,969 --> 00:15:40,459 pressure of the room that you're 426 00:15:45,609 --> 00:15:41,979 measuring do you have an idea of 427 00:15:48,069 --> 00:15:45,619 pressure linen it's gonna be lowered and 428 00:15:51,069 --> 00:15:48,079 or below the Milly bar it's it's it's 429 00:15:54,539 --> 00:15:51,079 way up in this exosphere so I yeah I 430 00:15:59,619 --> 00:15:54,549 don't have an exact Sager phase very low 431 00:16:02,019 --> 00:15:59,629 anymore so please don't forget to tell 432 00:16:04,479 --> 00:16:02,029 your name is the institution before 433 00:16:06,369 --> 00:16:04,489 asking a question Adam Sherman 434 00:16:07,869 --> 00:16:06,379 University of Arizona this is a really 435 00:16:10,089 --> 00:16:07,879 interesting I was curious to ask about 436 00:16:11,679 --> 00:16:10,099 data sets I Mazar recollect from your 437 00:16:13,479 --> 00:16:11,689 paper a few years ago you used harps and 438 00:16:14,679 --> 00:16:13,489 were looking at the sodium d-line and I 439 00:16:17,769 --> 00:16:14,689 was just curious to get your take on 440 00:16:20,619 --> 00:16:17,779 that versus like the cry res like really 441 00:16:23,109 --> 00:16:20,629 you know sort of near-infrared and then 442 00:16:24,639 --> 00:16:23,119 I guess also you didn't use cross 443 00:16:26,469 --> 00:16:24,649 correlation just because you're the line 444 00:16:29,799 --> 00:16:26,479 is so huge and committee users comment 445 00:16:32,289 --> 00:16:29,809 on that issue as well yeah that's one of 446 00:16:35,199 --> 00:16:32,299 them one of the advantages of working in 447 00:16:37,419 --> 00:16:35,209 the optical with with the sodium line is 448 00:16:38,649 --> 00:16:37,429 it's a very deep singular line you don't 449 00:16:41,589 --> 00:16:38,659 have to use cross correlation for 450 00:16:43,629 --> 00:16:41,599 unnecessarily and telluric contamination 451 00:16:45,189 --> 00:16:43,639 isn't as bad and isn't in the air 452 00:16:46,509 --> 00:16:45,199 infrared so there's there's a lot of 453 00:16:48,099 --> 00:16:46,519 things which should help you when 454 00:16:49,719 --> 00:16:48,109 looking at this one specific line and 455 00:16:51,639 --> 00:16:49,729 there's definitely possible to do in the 456 00:16:53,769 --> 00:16:51,649 infrared as well so I mean is your take 457 00:16:54,759 --> 00:16:53,779 that is there a preference of one versus 458 00:16:56,619 --> 00:16:54,769 the other or does it depend on the 459 00:16:58,389 --> 00:16:56,629 system or like how would you kind of 460 00:17:01,929 --> 00:16:58,399 judge that I would say it probably does 461 00:17:03,309 --> 00:17:01,939 depend some extent on the system the in 462 00:17:04,449 --> 00:17:03,319 some ways it is easier to use optical 463 00:17:07,749 --> 00:17:04,459 right now all the instruments we have 464 00:17:09,879 --> 00:17:07,759 it's not there's nothing stopping it 465 00:17:12,879 --> 00:17:09,889 being done in red it's something I'm 466 00:17:16,659 --> 00:17:12,889 looking in thank you 467 00:17:20,649 --> 00:17:16,669 any more questions because to and then I 468 00:17:23,139 --> 00:17:20,659 think we're gonna be done I just have a 469 00:17:24,970 --> 00:17:23,149 small question what's the lower limit of 470 00:17:26,799 --> 00:17:24,980 the wind speed that can be detected 471 00:17:27,730 --> 00:17:26,809 using these techniques 472 00:17:29,770 --> 00:17:27,740 what 473 00:17:31,740 --> 00:17:29,780 limits on a lower limit of the wind 474 00:17:35,560 --> 00:17:31,750 speed on the planet 475 00:17:37,570 --> 00:17:35,570 they said the arrow bars and I'm getting 476 00:17:39,310 --> 00:17:37,580 so it's probably probably about you 477 00:17:41,560 --> 00:17:39,320 could confidently detect sound to about 478 00:17:43,360 --> 00:17:41,570 a kilometer per second really any any 479 00:17:44,590 --> 00:17:43,370 lower than that and that that's pretty 480 00:17:46,660 --> 00:17:44,600 much the limit with the error bars I 481 00:17:48,310 --> 00:17:46,670 currently have but with with large 482 00:17:48,700 --> 00:17:48,320 telescopes new instrumentation to do 483 00:17:50,380 --> 00:17:48,710 that better 484 00:17:52,510 --> 00:17:50,390 so the LT you could go a bit lower 485 00:17:59,669 --> 00:17:52,520 expecting so with Part C how about me to 486 00:18:04,390 --> 00:18:02,500 Erica s University of Hawaii I guess for 487 00:18:07,870 --> 00:18:04,400 was forty nine be sort of continuing on 488 00:18:11,830 --> 00:18:07,880 the Adams query or I sure I think it was 489 00:18:15,610 --> 00:18:11,840 Michelle do we actually expect 490 00:18:17,830 --> 00:18:15,620 equatorial flow to continue up to the 491 00:18:21,010 --> 00:18:17,840 level where we see these extended 492 00:18:23,260 --> 00:18:21,020 atmospheres I am a little surprised yeah 493 00:18:25,750 --> 00:18:23,270 actually the flow structure is preserved 494 00:18:28,480 --> 00:18:25,760 at that level and then you can punt it 495 00:18:32,980 --> 00:18:28,490 that's I honestly I have the same 496 00:18:34,360 --> 00:18:32,990 question I don't know why this level in 497 00:18:36,040 --> 00:18:34,370 NamUs where I'm actually not sure what 498 00:18:42,260 --> 00:18:36,050 is expected but that's what I've