NOAO >   Observing Info >   Approved Programs >   2017B-0308

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Program Information for 2017B-0308


PI: Rebecca Canning, Stanford U., rcanning@stanford.edu
Address: Astronomy Program, Varian Building, Room 302c, Stanford, CA, 94305-4060 USA

CoI: Ashley King, Stanford U.
CoI: Emil Noordeh, Stanford U.
CoI: Steven Allen, Stanford U.
CoI: Glenn Morris, Stanford U.
CoI: Adam Mantz, Stanford U.
CoI: Steven Ehlert, NASA Marshall Space Flight Center
CoI: Anja von der Linden, SUNY
CoI: Tim Schrabback, Universitat Bonn
CoI: Mark Brodwin, U. of Missouri, Columbia
CoI: Matthew Bayliss, MIT
CoI: Michael McDonald, MIT
CoI: Adam Stanford, UC Davis
CoI: Julie Hlavacek-larrondo, University of Montreal
CoI: Lindsey Bleem, Argonne National Laboratory
CoI: Bradford Benson, U. of Chicago

Title: The role of environment in triggering/quenching X-ray AGN.

Abstract: We propose to observe 12 galaxy clusters at zāˆ¼0.7ā€“0.83, in the mass range 10^14ā€“10^15 solar masses with Gemini-South GMOS in order to study the environmental dependence and evolution of super massive black hole (SMBH) growth and star formation. Our study of X-ray AGN at lower redshift found a strong dependence of the AGN number density on the host galaxy cluster mass, scaling as M^-1. This non self-similar scaling is similar in form to that of the galaxy merger rate in clusters suggesting that galactic mergers and interactions are important for the triggering of cluster X-ray AGN. Other teams have found a strong redshift dependence of the AGN number density, rising to rates comparable with the field at z~1 and increasing further in high-z proto-clusters. However, the degree to which the degeneracy between mass and redshift influence these results is not known. Here we will follow-up on a robustly selected sample of high-z clusters for which we have previously attained the cluster redshift. We require only one mask per cluster field to identify all the X-ray bright AGN making this also the most efficient selection.

Program Type: Standard/Extragalactic

Scheduled Nights:
Run 1 (2017B):  GEM-SQ/GMOSS -- 27.7hrs band 2 (GS-2017B-Q-36)


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 >   2017B-0308

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