The cluster and field galaxy active galactic nucleus fraction at Z = 1-1.5: Evidence for a reversal of the local anticorrelation between environment and agn fraction

Paul Martini, E. D. Miller, M. Brodwin, S. A. Stanford, Anthony H. Gonzalez, M. Bautz, R. C. Hickox, D. Stern, P. R. Eisenhardt, A. Galametz, D. Norman, Buell Tomasson Jannuzi, A. Dey, S. Murray, C. Jones, M. J I Brown

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Abstract

The fraction of cluster galaxies that host luminous active galactic nuclei (AGNs) is an important probe of AGN fueling processes, the cold interstellar medium at the centers of galaxies, and how tightly black holes and galaxies co-evolve. We present a new measurement of the AGN fraction in a sample of 13 clusters of galaxies (M ≥ 1014 MȮ) at 1 < z < 1.5 selected from the Spitzer/IRAC Shallow Cluster Survey, as well as the field fraction in the immediate vicinity of these clusters, and combine these data with measurements from the literature to quantify the relative evolution of cluster and field AGN from the present to z ∼ 3. We estimate that the cluster AGN fraction at 1 < z < 1.5 is % for AGNs with a rest-frame, hard X-ray luminosity greater than LȮ X, H ≥ 1044 erg s-1. This fraction is measured relative to all cluster galaxies more luminous than , where is the absolute magnitude of the break in the galaxy luminosity function at the cluster redshift in the IRAC 3.6 μm bandpass. The cluster AGN fraction is 30 times greater than the 3σ upper limit on the value for AGNs of similar luminosity at z ∼ 0.25, as well as more than an order of magnitude greater than the AGN fraction at z ∼ 0.75. AGNs with LȮ X, H ≥ 1043 erg s-1 exhibit similarly pronounced evolution with redshift. In contrast to the local universe, where the luminous AGN fraction is higher in the field than in clusters, the X-ray and MIR-selected AGN fractions in the field and clusters are consistent at 1 < z < 1.5. This is evidence that the cluster AGN population has evolved more rapidly than the field population from z ∼ 1.5 to the present. This environment-dependent AGN evolution mimics the more rapid evolution of star-forming galaxies in clusters relative to the field.

Original languageEnglish (US)
Article number1
JournalAstrophysical Journal
Volume768
Issue number1
DOIs
StatePublished - May 1 2013

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active galactic nuclei
galaxies
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refueling
x rays
universe

Keywords

  • galaxies: active
  • galaxies: clusters: general
  • galaxies: evolution
  • X-rays: galaxies
  • X-rays: galaxies: clusters
  • X-rays: general

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

The cluster and field galaxy active galactic nucleus fraction at Z = 1-1.5 : Evidence for a reversal of the local anticorrelation between environment and agn fraction. / Martini, Paul; Miller, E. D.; Brodwin, M.; Stanford, S. A.; Gonzalez, Anthony H.; Bautz, M.; Hickox, R. C.; Stern, D.; Eisenhardt, P. R.; Galametz, A.; Norman, D.; Jannuzi, Buell Tomasson; Dey, A.; Murray, S.; Jones, C.; Brown, M. J I.

In: Astrophysical Journal, Vol. 768, No. 1, 1, 01.05.2013.

Research output: Contribution to journalArticle

Martini, P, Miller, ED, Brodwin, M, Stanford, SA, Gonzalez, AH, Bautz, M, Hickox, RC, Stern, D, Eisenhardt, PR, Galametz, A, Norman, D, Jannuzi, BT, Dey, A, Murray, S, Jones, C & Brown, MJI 2013, 'The cluster and field galaxy active galactic nucleus fraction at Z = 1-1.5: Evidence for a reversal of the local anticorrelation between environment and agn fraction', Astrophysical Journal, vol. 768, no. 1, 1. https://doi.org/10.1088/0004-637X/768/1/1
Martini, Paul ; Miller, E. D. ; Brodwin, M. ; Stanford, S. A. ; Gonzalez, Anthony H. ; Bautz, M. ; Hickox, R. C. ; Stern, D. ; Eisenhardt, P. R. ; Galametz, A. ; Norman, D. ; Jannuzi, Buell Tomasson ; Dey, A. ; Murray, S. ; Jones, C. ; Brown, M. J I. / The cluster and field galaxy active galactic nucleus fraction at Z = 1-1.5 : Evidence for a reversal of the local anticorrelation between environment and agn fraction. In: Astrophysical Journal. 2013 ; Vol. 768, No. 1.
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