NOAO >   Observing Info >   Approved Programs >   2012B-0302

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Proposal Information for 2012B-0302


PI: Kim-Vy Tran, Texas A&M University, kimvy.tran@gmail.com
Address: Physics Department, TAMU 4242, College Station, TX 77843, USA

CoI: Adam Tomczak, Texas A&M University
CoI: Casey Papovich, Texas A&M University
CoI: Greg Rudnick, University of Kansas
CoI: Tadayuki Kodama, NAOJ
CoI: Ken-ichi Tadaki, University of Tokyo

Title: Mapping Cool Gas In and Around Star-forming Cluster Galaxies at z=1.62

Abstract: We propose to obtain GMOS spectroscopy to search for and measure kinematics of cool gas in and around star-forming galaxies in a spectroscopically confirmed X-ray luminous cluster at z=1.62 (IRC 0218A). The cluster has 17 known (Ultra) Luminous Infra-Red Galaxies in its core and narrow-band imaging reveals that it is embedded in a larger super structure at z~1.6 traced by \OII emitters. We will target ~20 candidate cluster members to (i) double the number of confirmed members in IRC 0218A (currently only 12); (ii) map the large scale structure traced by \OII emitters; and (iii) measure the relative velocities of cool in/outflowing gas in cluster members as traced by, e.g. Magnesium absorption. We will also target ~10 bright galaxies at z>2 to use as background sources to probe for pristine cold gas filaments as identified by multiple UV absorption lines at z~1.6. Our study is the first to quantify the UV properties of cluster galaxies at z>1.5, how in/outflowing gas varies across environment, and how baryons cycle between galaxies and the Intra- Cluster Medium during a key cosmic epoch, i.e. when the universe was only ~4 Gyr old.


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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