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Physics Colloquium: Jenny Greene, Dwarf Galaxies and Their Black Holes

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Physics Colloquium: Jenny Greene, Dwarf Galaxies and Their Black Holes
When May 01, 2019
from 04:00 PM to 05:00 PM
Where MR418N
Contact Name
Contact Phone 212-650-7443
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Dwarf Galaxies and Their Black Holes


Jenny Greene
Professor of Astrophysical Sciences
Department of Astrophysical Sciences
Princeton University, Princeton, NJ 08544

Abstract
Because they are dark-matter dominated, dwarf galaxies provide some of the most stringent tests of our cold dark matter model. We continue to debate whether the number densities and distributions of low-mass galaxies match theoretical expectations. I will describe how the advent of deep and wide-area surveys like the Hyper-Suprime Camera (HSC) Survey (and eventually LSST) are changing our ability to find and characterize low-mass, low surface-brightness populations. First, I will present a new calibration of surface-brightness fluctuations to blue colors, which will provide a powerful new tool to determine satellite luminosity functions around nearby galaxies. Second, I will talk about our ongoing search for low-surface brightness galaxies is all environments with the HSC survey.  Finally, if time permits, I will discuss our search for wandering black holes in the  Milky Way using APOGEE+Gaia.