NOAO >   Observing Info >   Approved Programs >   2012B-0201

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Proposal Information for 2012B-0201


PI: Tyler Desjardins, The University of Western Ontario, tdesjar@uwo.ca
Address: Department of Physics & Astronomy, 1151 Richmond St., London, Ontario N6A 3K7, Canada

CoI: Sarah Gallagher, The University of Western Ontario
CoI: Iraklis Konstantopoulos, The Pennsylvania State University
CoI: Konstantin Fedotov, The University of Western Ontario
CoI: Kelsey Johnson, The University of Virginia
CoI: Panayiotis Tzanavaris, Goddard Space Flight Center
CoI: Lisa May Walker, The University of Virginia
CoI: Jane Charlton, The University of Pennsylvania
CoI: Brendan Mullan, The Pennsylvania State University
CoI: Laura Lenkic, The University of Western Ontario

Title: Mapping Star Formation in Dense Environments: H(alpha) Imaging of Compact Galaxy Groups

Abstract: Compact galaxy groups (CGs) host several galaxies within a few galaxy radii of each other, and they are the densest environments in the local Universe where star formation is still ongoing. Both strong and subtle dynamical interactions common in CGs influence star formation within and between group galaxies. We propose 6 nights of sensitive, narrow-band H(alpha) imaging with MOSAIC on the Mayall 4-meter of 9 CGs to create flux-calibrated maps of star formation within these systems. In addition to the 30 main group galaxies in this program, tidal features and intergalactic regions will be surveyed to catalog extragalactic knots of star formation. We aim to examine how this environment, characterized by multiple, complex, and prolonged interactions, affects the processing of gas into stellar mass. These observations will also facilitate the search for new star-forming dwarf group members up to 500 kpc from the group centers.


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 >   2012B-0201

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