NOAO >   Observing Info >   Approved Programs >   2010B-0205

Small NOAO Logo

Proposal Information for 2010B-0205


PI: Christopher Conselice, University of Nottingham, conselice@nottingham.ac.uk
Address: School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom

CoI: Alexander Fritz, Gemini Observatory - North
CoI: Shardha Jogee, University of Texas
CoI: Amanda Bauer, University of Nottingham
CoI: Fernando Buitrago, University of Nottingham
CoI: Asa Bluck, University of Nottingham
CoI: Ruth Grutzbauch, University of Nottingham
CoI: Ignacio Trujillo, University of Nottingham
CoI: Tim Weinzirl, University of Texas

Title: The Star Formation Rates in Ultra-Massive z > 2 Galaxies

Abstract: Understanding the assembly of the most massive galaxies is one of the most important problems in astronomy today. It is now feasible to identify the most massive galaxies out to z 2.5, yet we have just begun to probe their evolution. To address this, we propose to obtain deep NIRI NIR long-slit spectroscopy of a sample of 15 ultra-massive galaxies (M_* > 10^11 M_0) at 1.8 < z < 2.6 with large MIPS 24 um and UV fluxes, for which we have unique, deep imaging with HST/NICMOS. With NIRI spectroscopy we will measure: H-alpha SFRs, combine SFRs with NICMOS-derived sizes to calculate the surface star formation density and to derive estimates of cold gas masses. This will be the first systematic study of these properties within ultra-massive galaxies at this redshift. With this new data, we will investigate how gas supplies, star formation activity, and AGN feedback mechanisms influence the early formation of massive galaxies at z 2.


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 >   2010B-0205

noaoprop-help@noao.edu

Small NOAO Logo