ASTRONOMY COLLOQUIUM (Biard Lecture)

Wednesday, May 17, 2023

4:00pm to 5:00pm

Cahill, Hameetman Auditorium

Elves, Dwarfs, and Monsters

Jenny Greene, Professor of Astrophysical Sciences, Princeton University,

Our Local Group has been a rich testing ground for small-scale predictions of the Lambda Cold Dark Matter model, along with the impact of reionization and stellar feedback on the evolution of dwarf galaxies. However, we urgently need other samples of satellite systems around MW-mass hosts. I will present results from the Exploration of Local VolumE Satellites (ELVES) survey, that constructs the largest known sample of satellites around Milky Way-like hosts.

At the end, I will preview an exciting new sample of compact red sources at z>4 that we are finding with the Cycle 1 JWST Treasury Program UNCOVER. I will make the case that these sources are likely to be powered by accretion onto moderate-mass supermassive black holes, and I will highlight some exciting implications for black hole seeing and black hole growth.

To view this talk via YouTube, please visit: https://www.youtube.com/playlist?list=PLb1880Rn0qkKFkWyROUq1kRlgCsuBTrnd

For more information, please contact Dimitri Mawet by email at dmawet@astro.caltech.edu or visit http://www.astro.caltech.edu.

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