NOAO >   Observing Info >   Approved Programs >   2013B-0005

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Proposal Information for 2013B-0005


PI: Michael Cooper, UC Irvine, m.cooper@uci.edu
Address: Department of Physics and Astronomy, University of California Irvine, Irvine, CA 92697, USA

CoI: John Phillips, UC Irvine
CoI: Michael Boylan-Kolchin, UC Irvine
CoI: James Bullock, UC Irvine
CoI: Manoj Kaplinghat, UC Irvine

Title: The Galactic Delinquents Survey: A Search for Massive Failures around Milky Way Analogs

Abstract: The formation and abundance of the lowest luminosity galaxies represents one of the most significant issues facing galaxy formation today. The faintest galaxies probe feedback at its most effective and may offer clues to the particle nature of dark matter itself. Currently, we are secure in our accounting of the faint ~ 10^6 M_\sun dwarfs only in the Local Group - a regime that has gotten much attention via its association with the "Missing Satellites" and "Too Big To Fail" problems. However, the Local Group is just one system with limited statistical power - it may not be typical of the Universe at large. We propose to observe 2 Milky Way analogs, cataloging their satellite populations with WIYN/Hydra, so as to measure the stellar mass function to low masses in halos comparable to that of the Milky Way. Through comparison to corresponding high-resolution cosmological simulations, we will test (Lambda)CDM-based galaxy formation, directly examining the assumptions of the subhalo abundance matching technique and testing the universality of the "Missing Satellites" and "Too Big To Fail" problems.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2013B-0005

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