NOAO >   Observing Info >   Approved Programs >   2014A-0159

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Proposal Information for 2014A-0159


PI: Guilin Liu, Johns Hopkins University, liu@pha.jhu.edu
Address: Physics Department, 3400 N. Charles St., Baltimore, MD 21218

CoI: Nadia L. Zakamska, Johns Hopkins University
CoI: Michael A. Strauss, Princeton University
CoI: Jenny E. Greene, Princeton University
CoI: Rachael Alexandroff, Johns Hopkins University

Title: Quasar feedback at the peak of the galaxy formation epoch

Abstract: The correlations between properties of supermassive black holes and stellar spheroids in galaxies imply a physical connection between these two components. Using Gemini GMOS IFU, we demonstrated that powerful ionized gas winds are a ubiquitous feature in luminous radio-quiet obscured z~ 0.5 quasars. We now plan to extend this study to the era of peak galaxy formation and quasar activity - to the epoch when quasar feedback likely shaped the properties of massive galaxies. We propose a GMOS IFU survey to map the spatial distribution and kinematics of Ly(alpha) and N \sc v 1240Aemission around 5 obscured quasars at z=3-3.4 that are extremely luminous in Ly(alpha) (L_\rm Ly(alpha)~10^45 erg s^-1). We will directly probe the effects of ionizing radiation from obscured quasars on their large-scale environments and look for signatures of unbound quasar-driven outflows. Our observations will probe galactic (spatial resolution 3-6 kpc) to inter-galactic scales (field of view 40\times50 kpc^2 at z=3). Obscured quasars likely constitute the majority of the quasar population and may represent the relatively early enshrouded phase of black hole growth; thus, luminous obscured quasars are the most likely sites of quasar feedback, as we found at low redshift. Our proposed GMOS observations will provide a direct probe of the effects of quasars on their galaxy-wide and large-scale environments close to the peak of the galaxy formation epoch.


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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