The Invisible Atmospheres of Galaxies - Iryna Butsky - 12/02/2022

Galaxies are dynamic, evolving objects consisting of stars, gas, and dark matter, and are as diverse as the people on this planet. Galactic atmospheres (referred to as the circumgalactic medium) are key to understanding galaxy evolution, and perhaps, our own existence in the Milky Way. Join us for a 30-minute lecture on the galaxies and their invisible atmospheres, followed by a panel Q&A consisting of several astrophysicists to answer your questions about space science. Timestamps below:

00:00 Announcements
04:26 Intro to Galactic Atmospheres Presentation
05:14 Galactic Atmospheres Presentation
30:35 Q&A for Galactic Atmospheres Presentation
30:57 Microphone problems. Oof.
33:43 "How could the cosmic baryons be more than 100%?"
35:01 "Do black holes lead to red galaxies?"
36:24 "Can you elaborate on cosmic rays?"
38:48 "Does the shape of a galaxy correlate with CGM?"
42:00 Intermission
45:54 Q&A Panel Introductions
49:50 "Do we know all the ways galaxies can die?"
55:22 "How do supermassive black holes quench galaxies?"
56:17 "What is your stance on the Hercules-Corona Borealis Great Wall?"
58:07 "Star Trek or Star Wars?"
1:02:00 "How is the stuff between stars related to the galaxy?"
1:05:48 "How does gas form stars?"
1:09:38 "Will the James Webb Telescope help us understand the CGM?"
1:12:52 "Do you think the Multiverse is real?"
1:18:33 "What are upcoming exciting telescopes?"
1:23:00 "What is the boundary of the circumgalactic medium?"
1:24:55 "Can life change the chemistry of galaxies?"
1:28:53 "How do supernovae produce cosmic rays?"
1:32:18 "Do different supernovae produce different cosmic ray amounts?"
1:35:10 "How much can supernovae vary in energy?"
1:36:30 "How do relativistic fluids differ from non-relativistic fluids?"
1:38:20 "Can a black hole pass through a bigger black hole?"
1:42:50 "Are the boundaries of galaxies and dark matter halos well defined?"
1:45:55 "How did you choose your research focus in astrophysics?"
1:54:22 "What are good educational astronomy resources for children?"
1:59:07 Concluding Remarks

Presenter:

Dr. Iryna Butsky is a computational astrophysicist specializing in galaxies and their atmospheres. She received her BS in Astrophysics from Caltech and her PhD in Astronomy from the University of Washington before returning to Caltech as a DuBridge Postdoctoral Fellow. In her spare time, Iryna likes to spend time in the mountains and bake bread. www.irynabutsky.me

Abstract:

Galaxies are dynamic, evolving objects consisting of stars, gas, and dark matter, and are as diverse as the people on this planet. In order to understand why galaxies look the way they do and why some die (stop forming new stars) while others thrive, it is important to understand the environment in which they live. In this lecture, I will discuss how galactic atmospheres (referred to as the circumgalactic medium) are key to understanding galaxy evolution, and perhaps, our own existence in the Milky Way. I will highlight recent observations, taken with the Hubble Space Telescope, that challenge existing theoretical models and discuss possible solutions from recent research.

Видео The Invisible Atmospheres of Galaxies - Iryna Butsky - 12/02/2022 канала Caltech Astro