.Astronomy Events
Fall 2022
The Southern Stellar Stream Spectroscopic Survey: Overview and Latest Science Result
Speaker: Ting Li (University of Toronto)Host: Justin Spilker
The Southern Stellar Stream Spectroscopic Survey (S5) is an ongoing spectroscopic program that maps the newly discovered stellar streams with the fiber-fed AAOmega spectrograph on the Anglo-Australian Telescope (AAT). S5 is the first systematic program pursuing a complete census of known streams in the Southern Hemisphere, providing a uniquely powerful sample for understanding the building blocks of the Milky Way's stellar halo, the progenitors [...]Exploring the Production of High-Energy Photons with Reionization Analogue Galaxies
Speaker: Grace Olivier (Texas A&M University)Host: Justin Spilker
Currently, the observational and theoretical toolbox cannot discern between accretion onto black holes or hot massive stars as the source of ionizing photons for this cosmic reionization. The key to understanding the physical processes responsible for reionizing the universe are the nearby galaxies that are analogues to galaxies during the [...]
Luminous Merger Between Two Star-forming Galaxies 1.7Gyr After the Big Bang
Speaker: Kate Pitchford (Texas A&M University)Host: Justin Spilker
The bulk of stellar and black hole mass buildup in galaxies occurs in the high-redshift Universe in short, intense bursts of star formation and black hole accretion. However, the exact role of these two processes in assembling galaxies, as well as how much they affect one another, remains unclear. It [...]Early JWST Results on Distant Galaxies and the Lensed Star Earendel
Speaker: Dan Coe (Space Telescope Science Institute)Host: Justin Spilker
JWST is beginning to transform our understanding of the early universe. Over 100 papers on the arXiv have analyzed JWST data of galaxies. Some early tantalizing results have been puzzling, including claims of disks at z > 4, extremely dusty galaxies out to z > 5, impossibly massive galaxies at [...]Too Big to Fail? 6D Stellar Streams in the Milky Way and Cosmological Simulations
Speaker: Nora Shipp (Massachusetts Institute of Technology)Host: Justin Spilker
Recent large photometric, astrometric, and spectroscopic surveys have enabled the first systematic observations of Milky Way stellar streams in 6D. At the same time, cutting edge cosmological simulations are now at resolutions that allow for the study of dwarf galaxy streams around Milky Way-like hosts. In this talk, I will present the [...]