08:05:03 Good morning, everyone. Welcome to our week five event of the, the care TPS fundamentals of gashes halos.
08:05:17 We've now made it, 50% of the way through the program.
08:05:22 It's kind of mind blowing. To me, it's been a whirlwind so far. Hopefully you guys have gotten a lot out of it I know I have in terms of better understanding of the field, new ideas for for collaboration new ideas for projects.
08:05:37 But we've still got four four weeks, so hopefully you've paced yourself.
08:05:42 This week's focus is how does gas flow out of galaxies, both supernova driven and AGM driven.
08:05:51 And you can see our layout of different themes for different weeks. So this week is outflows next week is inflows. The week after that is the relationship between galaxy evolution and the gaseous halos.
08:06:06 And then finally future observations that will transform our understanding of the CGM, so I I'm pretty excited about this week but I'm also excited about all the remaining weeks so hopefully you guys share my enthusiasm, Just wanted to highlight my co
08:06:35 So, thanks.
08:06:37 Thanks cool organizers.
08:06:39 All right. Yeah, just as a quick recap. In case you're lost or you're just joining the program because you only care about outflows, and you don't care about any of the other aspects of the CGM.
08:06:50 We have a Google document that you can go to with this Bitly.
08:06:55 You are URL, and it provides basically all the base level information about what you've missed, as well as a detailed schedule and links to, you know, past lectures.
08:07:07 Recordings transcripts slides, everything is there.
08:07:10 So check it out. I use it as like my, my home base to make sure I know what the heck is going on. So it's updated constantly
08:07:21 a social event tonight. We will be having astronomy on tap on YouTube live this evening. It's in case you aren't familiar with the idea of astronomy on tap it is a traditionally it's hosted in a bar, so it's it's it's people drinking and talking about
08:07:42 science.
08:07:44 Obviously we've moved online so it's virtual, this will be streamed over the Celtic astronomy YouTube channel.
08:08:04 It starts tonight at 7:30pm. Pacific time. And there are two talks. As you can see, being given on the themes of this, this conference by participants in this conference, Jess work will be talking about intergalactic immigrants and Zach hyphen will be
08:08:08 discussing exploring the virtual universe.
08:08:13 So each of those talks will be about 15 minutes long, and then a couple of q amp a, a couple minutes of q amp a for each, and then at 830 we'll have astronomy themed pub trivia, that is interactive using the same mentee calm interface that we use for
08:08:37 structured discussion, and it's it's super fun. It's obviously we. These events are occur once a month, and are geared at the public, but we're kind of CO opting at this month to be more about the KITP themes, so feel free to join or feel free to join
08:08:53 just for the pub trivia or just the talks or whatever you're really interested in, but there's a link here but it's also in the social, the, the healer 21 social channel.
08:09:09 Okay, a consistent with YouTube, we have continued to get more and more entries to our new results channel, which goes to the YouTube channel specific to this KITP program.
08:09:22 So as a reminder, these are four minute four minute summaries of new results either papers that were submitted in 2020 or 2021 or some results that haven't yet been submitted.
08:09:35 But it's a really good way of guide, kind of like, keeping up on what the relevant new science that's being done without having to go in detail through the archive every day.
08:09:46 And and and yeah so I encourage people to submit, there's a video on how to generate a video. So hopefully, it takes people through all the difficult steps.
08:09:59 So last week we had eight submissions, some really interesting ones as well some of them themed so to the, to the discussions that we've been having.
08:10:10 There was a summary by Priyanka sing on constraints of precipitation limited hot halos that was super interesting.
08:10:19 There were a couple on Milky Way stuff so Hannah Bish had this one on the quasar survey, and then metallic had this cool one on the connection between the Milky Way and 30 ones CGM from simulations.
08:10:33 Related to that there was a really cool one again on sharing a CGM between two structures in this case, a dwarf, and a massive Galaxy by Husky and the techie.
08:10:45 And then there were three different ones on different aspects of medalists at and metal enrichment, including dust, by Roger soiree data.
08:10:57 Finally, there was a really interesting one, that crystal Martin and Julian assembled about this, this crazy system, this one galaxy that has both the thermal wind, a cosmic ray driven when a cold flow and a dark satellite so I encourage you guys to check
08:11:13 those out.
08:11:15 And yeah, they're each only four minutes so you don't have to take up a ton of time to get the deets on what's going on in the field.
08:11:26 We also on that same page, highlight Junior scientists who are on the, on the job market or who may be on the job market at some point in the near future.
08:11:39 Pictured here is Parvo Hogan, who is a PhD candidate at Michigan working with Mateo she was Kosky. And, yeah, this is a way that people can kind of get some exposure within the community in ways that we aren't really able to do this year because we're
08:11:56 doing so much stuff online. So he's our only submission, so go check them out. And if you two are on the job market I encourage you to make a 10 to 15 minute video.
08:12:08 But you can go to the halo 21 dash on the market Slack channel and and submit a video there or find out more about what to what to do but it will go to the same YouTube channel that are new results are going.
08:12:23 It's just a different playlist. So, thank you, Marco for submitting your your your your submission.
08:12:31 Okay, so a couple of featured conversations this week one, we're going to not today but on Friday we're going to get an update there's been a lot of activity in the middle of the city channel since, since week one, really, there's been ongoing work between
08:12:48 Zach Haven, Jane Charlton Samir myself and a few others, trying to, to create synthetic observations, where we know all the details from simulations and then see if the observers can reproduce what we've what we've quoted in there and very simple cases
08:13:07 so we'll hear an update of that on Friday, but it's a lot of cool ongoing work that's going on there.
08:13:14 And we'll also hear today from the visualization group or featured conversation in the visualization group led by Joe Birgit and Stephanie Thomason, and I think Dylan Nelson as well.
08:13:27 They're deeming this week visualization week. So, there will be a bunch of really cool themes are surrounding that and, and I believe a challenge to to everyone participating to to potentially provide their, their, their biggest request on some aspect
08:13:46 of things that they want visualized related to that, there's the mark Voight started the halo 21 beauty channel, which is beautiful images either observed images or, or simulated images, that's super cool and really inspiring so I encourage people to
08:14:06 check that out as well as submit their own examples of that whether they produced it or they just saw it somewhere online or a collaborator.
08:14:15 And then there's the halo 21 AGN group, since that's obviously related a gn are related to to outflows the theme of this week so I encourage people to check those out and we'll hear again from them on Friday after today.
08:14:31 So yeah, Today's activities are.
08:14:36 We'll, we'll hear from the group, and then we'll do speed collaboration will get back to this in a second. I'm just taking you through the activities of this week sorry these announcements are a bit long.
08:14:46 This week, you know, Mondays we try and lay out everything for the week. So just to give you guys a heads up of what's going on Tuesday, we will have a talk keynote talk given by Dylan Nelson from Heidelberg on the theme of this week, how does how does
08:15:00 gas flow out of galaxies.
08:15:03 out of galaxies. And then we'll follow up with a panel discussion featuring wrong on board lawyer john Chisholm revealed of a tango Kim and merely, so I'm, I'm pretty psyched about that.
08:15:14 I think that's a really good group.
08:15:16 We will have interesting tutorials on Wednesday. So, Joe Birgit is going to consistent with the visualization theme of this week is going to give a really cool demo of a tool he's been creating over the last year called cosmos is and how you can use it
08:15:37 to visualize interactively within your web browser, super cool.
08:15:42 The cosmic web and the CGM and then since sightlines through it to probe individual things. It's really an awesome tool, and I think he's requesting beta testers to get feedback on the design so that will be awesome.
08:15:55 At 840 on Wednesday, we will have a talk by Evan Schneider on mass loading in galactic outflows so these are all tutorials, teaching you some skill that you may not be aware of or or possess at that point.
08:16:11 so I'm pretty psyched mass looting is kind of baffled me in the past so I'll certainly be learning something from Evans talk at 840. And then finally, we're going to hear about weight profile absorption line fitting that sort of thing with Marie Lau,
08:16:29 and I believe, she'll also be joined by Joe Burgett as well as Ramon Portnoy for different tools for fitting absorption lines now. Maybe you observers have it all figured out.
08:16:40 Or maybe you just have your one tool that you use for fitting the sorts of things but as theorists don't really know what goes into this so I'm, I think it'll be really beneficial for breaking down the barriers between these different communities.
08:16:55 Also on Wednesday, there are a couple of after parties that people have announced the cosmic ray group led by Chad bustard and Christoph Fromer will be hosting an after party at noon, that day to discuss cosmic rays.
08:17:12 Go to the halo 21 cosmic rays channels to find out the link to that particular thing but that should be pretty cool. And then right after that at one o'clock on one on Wednesday, there will be a visualization discussion led by Joe Burgett Stephanie Thomason
08:17:28 and Dylan Nelson.
08:17:31 I'm sure we'll hear a bit more about that today, when they when they speak in a couple of minutes.
08:17:37 And then finally, Thursday, we will have our second keynote of the week, being given by Tim Heckman from Johns Hopkins, and there will be a panel discussion featuring Cassie Lucas crystal Martin, Evan Schneider and Chuck's di del talking about outflows
08:17:55 outflows in in galaxies.
08:17:58 And then Friday we'll hear from our future conversations again and we'll have structured discussion like we have in the last the last few Fridays where you get to pick which questions we discuss and then we break into small groups and talk about talk
08:18:12 about those relevant questions to the theme of this week.
08:18:17 So, again, a reminder for today.
08:18:19 We will, I will turn it over in just a moment to our, our, our visualization leaders Joe Birgit and Stephanie Thomason and, and perhaps Dylan Nelson as well.
08:18:31 And then following their, their discussion we will jump into speed collaboration where we pair up with other people and kind of break the ice and get an idea of what what topics we have in common and and meet meet more people from the community one on
08:18:47 one in five minute little randomly selected breakout sessions.
08:18:52 Okay.
08:18:55 I will turn it over to Joe Stephanie and Dylan.
08:19:04 Thank you.
08:19:07 Okay, so, um, it is my pleasure and Stephanie's pleasure to introduce the halo 21 visualization conversation group. So, this, there's there's already been quite a bit of of action happening here on this in the corresponding Slack channel.
08:19:29 What you see written here.
08:19:31 Um, and among that action is this image that's on my first slide here. This was posted by Dylan Nelson, just an absolutely breathtaking view of shock structure.
08:19:49 In the second galactic medium, and intergalactic medium. I think this is this is representing a volume about 300 mega parsecs across 40 mega parsecs in the other direction, something like that.
08:19:59 So we're really getting a sense of the large scale structure in the tng simulation that is kind of a really unique scientifically useful and beautiful, beautiful example.
08:20:14 So I just wanted to lay out some, some goals for for this group. And the idea here is to bring people together.
08:20:24 Both observers simulators, even visualization experts who may not be astrophysicists to share their tools, share their methods.
08:20:36 Inspire one another, identify how observers theorists can communicate through visualization and through visualization methods to inspire each other and and collaborate more more fruitfully.
08:20:57 And, as well, for new collaborations, as I mentioned, between observers, and simulators, but also with visualization.
08:21:07 Personnel which I'll talk more about the set.
08:21:10 And just to bring some exposure to how powerful visualization can be for our science for public outreach and all sorts of things. So, some events that will be going on.
08:21:26 First and foremost, we have our Slack channel, as I said, some conversations already been happening there people have been sharing their examples of visualizations and movies and and so on, please continue we've already seen some great stuff.
08:21:41 We are honored to have joining us, my collaborator, Angus Forbes who is a visualization expert.
08:21:50 He is he runs the creative coding lab in the computational media department at UC Santa Cruz, and it's an excellent resource for all things visualization, machine learning, all kinds of stuff.
08:22:04 Cameron mentioned our after party happening on Wednesday. This will be at 12:30pm. Pacific time, it's sure to be a hoot suite at 1230 or is it at one.
08:22:17 It is.
08:22:27 I thought we move one, we did we move it back a half hour Thank you. Sorry. outdated slide here, so yes 1pm, on, on Wednesday.
08:22:31 That's pacific time.
08:22:32 And lastly, a plug for the cosmos tutorial happening Wednesday, should be the first I think it's going to be the first tutorial on Wednesday session, I am recruiting beta testers.
08:22:46 Alpha testers.
08:22:48 Sure, the difference. But please, please join and I think it should be should be quite good fun.
08:22:56 Okay, so I'll turn it over to Stephanie. I think she has some inspiring examples to get things, heated up for for the remainder of the week, and the rest of the major the workshop.
08:23:09 Great. Thanks, um, let me see here, I think, share, first, and then
08:23:20 maybe be able to.
08:23:26 Okay. Do you all see my slideshow or my presenter tool slideshow. Excellent. Okay, so, you know, we've been we've had it really easy. I think because, you know, everybody this, this whole meeting has been using amazing visualizations, and that's basically
08:23:47 the bread and butter of, you know, astronomy and and and sharing our work. And so, you know, I just wanted to touch on a couple images.
08:23:57 It was incredibly hard for me to choose and some some really good visualizations that I liked.
08:24:04 Just from the plenary talks, I mean there's been so many amazing things I was, I was watching them over breakfast this morning and I was like, Oh, I wish I should put that in I should put this in.
08:24:15 But you know, we don't actually have two hours to look at a greatest hits real of this so anyway so I thought that I would just show a couple visualizations and actually really highlight that.
08:24:28 I don't think that we're really talking about you know visualizations always in terms of, you know, 3d movies like like I'm like I'm showing here right this is a really broad topic and and we really want to try to bring everybody into kind of discussing.
08:24:44 What's really useful for them.
08:24:47 So, you know, from from week one, we have this this image of a density temperature diagram, which happens to be my, my go to diagram, as Joe might discuss later I love density temperature diagrams.
08:25:06 And those might be fighting words because I know there might be a few people on this call that like pressure entropy diagrams, and so we could have a discussion about that, but for me it's roti all the way.
08:25:17 And this is a great visual because we see this density and temperature, and then we also see the, the lines that we can actually observe at each of these densities and temperatures.
08:25:28 And so this one I think is incredibly useful, and really gives us a lot of insight into what observations are telling us about kind of the fundamentals of the gas.
08:25:39 Um, another great visual is just these gas density profiles right we're looking at Radio profiles of clusters. This is so nice and clean, because you can put on analytic models, and do a direct numerical comparison between your observations numerical
08:26:02 analytic models simulations. So, you know, this is an incredibly powerful visual from from week one oh sorry my week one got cut off.
08:26:15 Okay so moving on to week two, I thought this was really amazing from week to just seeing how a changing our spectral resolution changed.
08:26:41 visualization. Then, another visualization from week two is kind of this beautiful illustration that clearly shows the impact of tea cool versus tea free fall on precipitation.
08:26:57 And so I don't need to even really see the, the numbers just, you know, this gives us an intuitive interpretation of what's going on here.
08:27:11 Then. On a similar note from week three, we have this mixing layer slice, which I really like because you know first that top slide is really beautiful.
08:27:26 I really like that we have drawn on there. The, the variables for really kind of understanding what's going on in in determining the mixing rate. And then, unlike the previous slide where we kind of got a really visceral interpretation of how different
08:27:45 those those different t cool over T freefall is just by looking at these images we can really see how radiative mixing layers are are related to these turbulent combustion layers.
08:28:12 And so, you know, this is a really beautiful visualization, another one from week three is, you know, these observations of magnetic fields and synchrotron filaments and galaxies, and so, you know, I think that for simulators to try and reproduce this
08:28:17 kind of observation is going to be really key for trying to constrain.
08:28:24 You know, non HD physics in in simulations and so these kind of images I think are really awesome.
08:28:31 Then this one, I took a little bit of privilege and grabbed the actual image from the paper rather than this slideshow slide to show and have this work, where you're comparing simulations and every single one of these panels, except for the bottom right
08:28:49 corner which is an observation. So this is all done using exactly the same code, so that you can get a really nice visual interpretation of which of these simulations is well matching the observation.
08:29:05 And then another one here I feel like we could have an entire week conversation on this image, honestly, you've got admission, you've got absorption, you have gas at different temperatures, moving at different velocities and, and then somehow we have
08:29:23 to interpret you know we have these nice beautiful clouds here of each one, but you have kind of lines of sight for, oh six and how correlated is everything and how connected is everything and can we use visualizations from simulations to kind of understand
08:29:39 the physics here and and what level of agreement Do we really need to to get kind of a good interpretation here between different visualizations.
08:29:51 Um, but you know on that same note, actually.
08:29:56 No, I'm not moving forward. There we go. Okay, um, you know, we also saw some really excellent ways that simulations are agreeing with observations and so in the color bars here are showing the simulations, the admission that you would get from ionized
08:30:15 gas, and then they're matching with the points which are the observations.
08:30:19 And so you can get some idea there of the agreement between a simulation and observations and something I'm really interested in discussing maybe is, you know, is this is this good enough, you know, is this is this kind of the level of agreement we need
08:30:32 individualization or do we have to go further and try to really, you know, kind of pinpoint exact agreements and disagreements, and then kind of on that same note, you know, a discussion that I think is worth having is you know what's, what's the use
08:30:48 of visualizations are they more qualitative or are they more quantitative and, you know, some I think are very clearly, like, well, I don't want to say very clearly because I feel like I might step on some toes there.
08:31:04 But, um, you know I feel like you get a really qualitative interpretation of what's going on. Some of them are more quantitative, where you can really kind of measure you could you could determine how well fit different lines are.
08:31:18 But in fact, you know, most of the visualizations that I showed you, I think, like live kind of in the middle of this range where they're a little bit qualitative they're a little bit quantitative, you know, and I think that might be the sweet spot of
08:31:32 of visualizations.
08:31:35 And so I'm really interested to hear you know how quantitative Do we have to go. How much can we get out of a purely qualitative visualization in our discussions to this week.
08:31:46 But those aren't actually our challenges. And for that I think I can go back to Joe.
08:32:00 Yes, thanks. So, I'm having having been inspired by all this beautiful work that we've seen already. Um, we do want to pose a couple of challenges here.
08:32:13 So first, this is to observers, and the charges to name an informative image plot representation that you would like simulators to be able to make so this is going back to the point Stephanie was just making qualitative versus quantitative.
08:32:33 And in terms of analysis in terms of the ability to to glean scientific insight. So, so this is one.
08:32:42 The other is for anyone. And so this is to some of you who have been doing this already, please show us your go to visualization that's really informative and that you think everyone else should be making, so perhaps we can continue this pressure entropy.
08:32:57 vs. vs roti discussion in our, in our Slack channel, and in keep the keep that debate raging. So, thanks, everyone, let's have a fun week here and looking forward to interacting I see people are already already hitting us up for for recommendations over
08:33:20 the Slack channel So, So let's keep all that going. Thank you.
08:33:25 Excellent. Thank you Joe Thank you Stephanie.
08:33:29 Yeah, I like that this challenge, getting getting some more crosstalk between different communities on what what observers really want to see simulators actually produced from our simulation So, so, have at it people, I think that's great.
08:33:47 Alright so we don't have a second featured conversation to present, right now, we'll hear more from the middle of city group on Friday, but I want to move straight to our speed collaboration.