Star formation and AGN activity in galaxy clusters from z = 1-2: a multi-wavelength analysis featuring Herschel/PACS

Journal Article · Fri Jul 01 00:00:00 EDT 2016 · Astrophysical Journal

DOI:https://doi.org/10.3847/0004-637X/825/1/72· OSTI ID:22868933

Alberts, Stacey; Jannuzi, Buell T. ^[1]; Pope, Alexandra; Cybulski, Ryan ^[2]; Brodwin, Mark ^[3]; Chung, Sun Mi ^[4]; Dey, Arjun ^[5]; Eisenhardt, Peter R. M.; Stern, Daniel ^[6]; Galametz, Audrey ^[7]; Gonzalez, Anthony H. ^[8]; Stanford, S. Adam ^[9]; Snyder, Gregory F. ^[10]; Zeimann, Gregory R. ^[11]

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1. Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States)
2. Department of Astronomy, University of Massachusetts, LGRT-B 619E, Amherst, MA 01003 (United States)
3. Department of Physics and Astronomy, University of Missouri, 5110 Rockhill Road, Kansas City, MO 64110 (United States)
4. Department of Astronomy, The Ohio State University, 140 W 18th Avenue, Columbus, OH 43210 (United States)
5. National Optical Astronomy Observatory, 950 North Cherry Avenue, Tucson, AZ 85719 (United States)
6. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States)
7. Max-Planck-Institut fuer Extraterrestrische Physik, Giessenbachstrasse, D-85748 Garching (Germany)
8. Department of Astronomy, University of Florida, Gainesville, FL 32611-2055 (United States)
9. Physics Department, One Shields Avenue, University of California, Davis, CA 95616 (United States)
10. Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States)
11. Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802 (United States)

We present a detailed, multi-wavelength study of star formation (SF) and active galactic nucleus (AGN) activity in 11 near-infrared (IR) selected, spectroscopically confirmed massive (≳10{sup 14} M {sub ⊙}) galaxy clusters at 1 < z < 1.75. Using new deep Herschel/PACS imaging, we characterize the optical to far-IR spectral energy distributions (SEDs) for IR-luminous cluster galaxies, finding that they can, on average, be well described by field galaxy templates. Identification and decomposition of AGNs through SED fittings allows us to include the contribution to cluster SF from AGN host galaxies. We quantify the star-forming fraction, dust-obscured SF rates (SFRs) and specific SFRs for cluster galaxies as a function of cluster-centric radius and redshift. In good agreement with previous studies, we find that SF in cluster galaxies at z ≳ 1.4 is largely consistent with field galaxies at similar epochs, indicating an era before significant quenching in the cluster cores (r < 0.5 Mpc). This is followed by a transition to lower SF activity as environmental quenching dominates by z ∼ 1. Enhanced SFRs are found in lower mass (10.1

• OSTI ID: 22868933
• Journal Information: Astrophysical Journal, Vol. 825, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
COSMIC DUST
ENERGY SPECTRA
GALAXIES
GALAXY CLUSTERS
INFRARED RADIATION
MASS
QUENCHING
RED SHIFT
STARS
WAVELENGTHS