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Title: X-RAY SELECTED AGN HOST GALAXIES ARE SIMILAR TO INACTIVE GALAXIES OUT TO z = 3: RESULTS FROM CANDELS/CDF-S

We use multi-band spatially resolved photometry from the Cosmic Assembly Near-IR Deep Legacy Survey in the 4 Ms Chandra Deep Field-South to explore the nuclear and extended colors, color gradients, and stellar populations of the host galaxies of X-ray selected active galactic nuclei (AGNs) out to z = 3. Based on a study of their central light, we develop X-ray based criteria to exclude objects with strong AGN contamination. We use stellar masses from the FIREWORKS database to understand and account for stellar mass selection effects and carefully study, for the first time, the resolved host galaxy properties of AGNs at z {approx} 2 in their rest-frame optical light without substantial nuclear contamination. AGN hosts span a sizable range of stellar masses, colors, and color gradients at these redshifts. Their colors, color gradients, and stellar population properties are very similar to inactive galaxies of the same stellar mass. At z {approx} 1, we find a slightly narrower range in host colors compared to inactive galaxies, as well as hints of more recent star formation. These differences are weaker or non-existent among AGN hosts at z {approx} 2. We discuss the importance of AGN-driven feedback in the quenching of galaxies atmore » z {approx}> 1 and speculate on possible evolution in the relationship between black hole accretion and the host galaxy toward high redshifts.« less
Authors:
; ;  [1] ; ; ;  [2] ; ; ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ; ;  [9] ;  [10] ; ;  [11] ;  [12] more »; « less
  1. Max-Planck-Institute for Extraterrestrial Physics, Garching, D-85748 (Germany)
  2. Astronomy Department and UCO-Lick Observatory, University of California, Santa Cruz, CA 95064 (United States)
  3. Space Telescope Science Institute, Baltimore, MD 21218 (United States)
  4. Department of Physics, Colby College, Waterville, ME 04901 (United States)
  5. Observatories of the Carnegie Institution of Washington, Pasadena, CA 91101 (United States)
  6. Racah Institute of Physics, The Hebrew University, Jerusalem 91904 (Israel)
  7. Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)
  8. Institute for Astronomy, Royal Observatory, Edinburgh EH9 3HJ (United Kingdom)
  9. Department of Astronomy, University of Massachusetts, Amherst, MA 01003-9305 (United States)
  10. Department of Physics and Astronomy, University of Kentucky, Lexington KY 40506-0055 (United States)
  11. Department of Physics, Imperial College, London SW7 2AZ (United Kingdom)
  12. Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260 (United States)
Publication Date:
OSTI Identifier:
22167183
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 763; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTRONOMY; ASTROPHYSICS; BLACK HOLES; COLOR; COMPARATIVE EVALUATIONS; GALAXY NUCLEI; MASS; PHOTOMETRY; RED SHIFT; STAR EVOLUTION; STARS; VISIBLE RADIATION; X RADIATION; X-RAY GALAXIES