NOAO > Observing Info > Approved Programs > 2009B-0148
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NOAO > Observing Info > Approved Programs > 2009B-0148 |
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PI: Matthew G. Walker, University of Cambridge, walker@ast.cam.ac.uk
Address: Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, United Kingdom
CoI: Vasily Belokurov, Institute of Astronomy, Cambridge
CoI: Mike Irwin, Institute of Astronomy, Cambridge
CoI: Martin Smith, Institute of Astronomy, Cambridge
CoI: Daniel Zucker, AAO/Macquarie University, Sydney
CoI: Mark Wilkinson, University of Leicester
Title: New Milky Way Satellites: Survival of the Densest
Abstract: We propose observations with the KPNO 4m + MOSAIC imager to obtain deep color-magnitude data of regions around Segue 2, the most recently discovered ultra-low luminosity Milky Way satellite, as well as follow- up data on seven new satellite candidates identified with new SDSS-III (SEGUE and BOSS) data. We plan to observe Segue 2 in a 4\times 4 mosaic in order to study its association with a superposed stellar stream detected kinematically, and to look for structural evidence of tidal disruption within Segue 2 itself. We plan 2\times 2 mosaics for each of the seven new satellite candidates, in order to determine their nature (e.g., dwarf galaxies, star clusters, false-positives) and to study their morphologies out to angular radius ~ 0.5 degrees. Those confirmed as new dwarf galaxies will be among the least luminous (M_V >=-8.0) galaxies known at \textitany redshift and will provide laboratories for studying the physics of galaxy formation at extremely small scales.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360
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NOAO > Observing Info > Approved Programs > 2009B-0148 |
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