Seeing the Invisible: Astronomical Radio Waves - Nitika Yadlapalli - 05/26/2023

Beyond our visible view of stars and galaxies, what does the sky look like in radio waves? How do radio telescopes work to reveal these strange astronomical phenomena? Join us for a 30-minute lecture investigating the invisible universe of radio astronomy, followed by a panel Q&A consisting of several astrophysicists to answer your questions about space science. Timestamps below:

00:00 Stream Start
00:12 Announcements
04:57 Intro to Radio Astronomy Presentation
06:05 Radio Astronomy Presentation
30:20 Q&A for Radio Astronomy Presentation
30:42 "Why don't radio telescopes take pictures?"
33:45 "What's a day in the life of a radio astronomer?"
35:27 "What are the different types of radio antennae?"
37:11 "How does the Deep Space Network connect via radio waves through cloud cover?"
39:43 "Is there a lot of radio interferometry in use today?"
42:47 Intermission
45:17 Q&A Panel Introductions
51:15 "What do galaxies look like at the end of their lives?"
57:15 "Why do galaxies contain supermassive black holes?"
59:33 "How long will the SN 2023ixf remain bright?"
1:02:12 "How will astronomers handle the large amount of data coming from next-generation telescopes?"
1:09:01 "What other wavelengths of light have been detected for SN 2023ixf?"
1:10:52 "How do black holes look in radio waves?"
1:15:10 "What is the next big radio telescope?"
1:21:55 "Do radio waves diminish in space? Are they influenced by redshift?"
1:25:12 "Do radio waves get bent through gravitational lenses?"
1:29:58 "How does matter get ejected from black holes?"
1:32:25 "What are your opinions on the movie Contact?"
1:37:37 "Do radio astronomers 'listen' to their data like in Contact?"
1:40:07 "Can you ever witness something falling into a black hole?"
1:44:57 "Are scientists using AI in their research?"
1:49:23 "Why do radio waves travel differently at night?"
1:53:06 "Which came first: stars or black holes?"
1:56:00 Concluding Remarks

Title: Seeing the Invisible: Astronomical Radio Waves
Speaker: Nitika Yadlapalli
Abstract:
Humans can only see a narrow range of wavelengths of light, but the electromagnetic spectrum of light covers a much broader range. Radio telescopes can "see" many objects in space that our eyes cannot, including flashes given off by highly magnetic stars, energetic jets erupting from black holes, and radiation emitted from supernovae. But how do these radio telescopes work and how can we build one? Over the last several years, I have been working on a new radio telescope called SPRITE in the desert north of Los Angeles. I will discuss how this telescope works, how we built it, and how we can use it to make new astronomical discoveries.

Видео Seeing the Invisible: Astronomical Radio Waves - Nitika Yadlapalli - 05/26/2023 канала Caltech Astro