The Quest for Cosmic Dawn - Richard Ellis - 04/14/2023

How did galaxies form just after the birth of our Universe? How is the James Webb Space Telescope transforming our view of the early Universe? Join us for a 30-minute lecture by esteemed professor Richard Ellis, 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
03:44 Intro to Cosmic Dawn Presentation
07:34 Cosmic Dawn Presentation
47:06 Q&A for Cosmic Dawn Presentation
47:23 "What generation of stars produced the heavy elements in the first galaxies?"
48:57 "Why are early galaxies brighter than theory predicts?"
51:25 "How homogenous is the luminosity of galaxies in the early universe?"
52:53 "How is JWST observing time distributed amongst scientists?"
57:22 "How do we measure the redshift (lambda) of distant galaxies?"
1:00:51 Intermission
1:08:29 Q&A Panel Introductions
1:13:22 "How have views on public science communication changed over time?"
1:19:04 "Does the Universe have its own consciousness?"
1:23:00 "Why are early galaxies brighter than theory predicts?"
1:31:31 "How long after star formation began did the first galaxies form?"
1:38:12 "How do scientists pivot when their hypotheses are disproven?"
1:44:00 "What type of astronomical observations are the most promising today?"
1:48:42 "Will the Big Bang Theory itself be challenged by JWST?"
1:53:34 "What role did dark matter play in early galaxies?"
1:58:40 Concluding Remarks

Title: The Quest for Cosmic Dawn: First Results from the James Webb Space Telescope
Speaker: Richard Ellis
Abstract: The first billion years after the Big Bang represent the final frontier in assembling a complete picture of cosmic history. During this period early galaxies formed and the universe first became bathed in light. How and when did all this occur? Recent progress with the James Webb Space Telescope suggests we may soon witness this dramatic period when the universe emerged from darkness. I will describe the astonishing progress in this quest up to and beyond the launch of JWST. The motivation is fundamental: the origin of starlight began the process of chemical evolution which ultimately led to our own existence in this remarkable universe.

Speaker Biography:
Richard Ellis is one of the most important people working in the field of observational cosmology. He has made ground-breaking contributions to numerous areas in astrophysics over the course of his illustrious career spanning five decades. He has conducted significant research in the fields of galaxy formation and evolution, astronomical instrumentation, stellar astrophysics, gravitational lensing, large-scale structure, reionization, the accelerating expansion of the universe, and most recently, the most distant galaxies known. He is currently a Professor of Astrophysics at the University College London after previously serving as Professor of Astronomy at Caltech and Director of Palomar Observatory. Among his many accolades, he has been awarded the Gold Medal of the Royal Astronomical Society, the Royal Medal of the Royal Society, the Gruber Prize in Cosmology, and has been given the title of Commander of the Order of the British Empire (CBE).

You can order Professor Ellis' new book entitled: "When Galaxies Were Born" with a discount rate of 30% using code: ELLIS30 for a limited time. https://press.princeton.edu/books/hardcover/9780691211305/when-galaxies-were-born

Видео The Quest for Cosmic Dawn - Richard Ellis - 04/14/2023 канала Caltech Astro