Fireworks from Black Holes Devouring Stars - Yuhan Yao - 01/20/2023

While supermassive black holes themselves do not emit light, they can be "awakened" when a star gets too close and is torn apart by their powerful gravitational forces. Join us for a 30-minute lecture on how black holes consume stars, followed by a panel Q&A consisting of several astrophysicists to answer your questions about space science. Timestamps below:

00:00 Start of Stream
00:42 Announcements
04:59 Intro to Black Holes Presentation
05:38 Black Holes Presentation
35:10 Q&A for Black Holes Presentation
35:36 "How large are these black holes and their disks?"
36:24 "Do tidal disruption events emit gravitational waves?"
37:12 "Will you play the animation again?"
37:40 "Are the jets from the star or black hole?"
38:03 "What is the solar corona?"
39:55 "Could TDEs create a quark-gluon plasma around the black hole?"
41:39 "What happens to the stars' cores during the tidal disruption?"
42:49 Intermission
46:50 Q&A Panel Introductions
50:05 "What are gravitational waves?"
53:06 "Are gravitational waves affected by the Doppler effect?"
54:06 "When black holes collide, how long does it take for us to observe them?"
55:55 "How much does spacetime stretch and expand?"
57:25 "Do stars get brighter when they are devoured by a black hole?"
58:23 "What does the interior of a black hole look like?"
1:01:50 "What skillsets are important for becoming an astrophysicist?"
1:06:32 "Could there be a quark-gluon plasma around a black hole?"
1:11:10 "Will we ever directly detect dark matter?"
1:15:23 "Have any panelists been science advisors for any movies?"
1:21:30 "Does time dilation work additively?"
1:23:58 "Tell us about this new comet."
1:30:36 "Do black holes create anything?"
1:33:40 "Do tidal disruption events create new elements?"
1:38:24 "Is the shadow of the black hole larger than the BH itself?"
1:40:42 "Can weakly interacting massive particles be dark matter?"
1:43:31 "Will we ever find Planet Nine?"
1:49:55 "Was gravity the first thing in the universe?"
1:52:36 "What's the connection between gravity and time?"
1:56:15 "Will Earth's gravity ever change?"
1:58:04 "Why do outer planets have lighter elements and inner planets have heavier elements?"
2:02:32 Concluding Remarks

Speaker:

Yuhan Yao is a PhD candidate at Caltech. She uses optical sky surveys and X-ray telescopes to study the most energetic phenomena in the universe, such as the explosion of stars, and the extreme environments around neutron stars and black holes. In addition to astronomical research, she likes coffee, window shopping, and Japanese anime. https://yaoyuhan.github.io/

Видео Fireworks from Black Holes Devouring Stars - Yuhan Yao - 01/20/2023 канала Caltech Astro