Wide field multiband imaging of low redshift quasar environments

Jennifer E. Scott, Alireza Rafiee, Jill Bechtold, Erica Ellingson, Christopher Thibodeau, Michael Richmond

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We present photometry of the large-scale environments of a sample of 12 broad line active galactic nuclei (AGNs) with 0.06 < z < 0.37 from deep images in the Sloan Digital Sky Survey u, g, r, and i filters taken with the 90Prime prime focus camera on the Steward Observatory Bok Telescope. We measure galaxy clustering around these AGNs using two standard techniques: correlation amplitude (B gq) and the two point correlation function. We find average correlation amplitudes for the 10 radio-quiet objects in the sample equal to (9 ± 18, 144 ± 114, -39 ± 56, 295 ± 260) Mpc1.77 in (u, g, r, i), all consistent with the expectation from galaxy clustering. Using a ratio of the galaxy-quasar cross-correlation function to the galaxy autocorrelation function, we calculate the relative bias of galaxies and AGNs, b gq. The bias in the u band, b gq = 3.08 ± 0.51 is larger compared to that calculated in the other bands, but it does not correlate with AGN luminosity, black hole mass, or AGN activity via the luminosity of the [O III] emission line. Thus ongoing nuclear accretion activity is not reflected in the large scale environments from 10 h -1 kpc to 0.5 h -1 Mpc and may indicate a non-merger mode of AGN activity and/or a significant delay between galaxy mergers and nuclear activity in this sample of mostly radio-quiet quasars.

Original languageEnglish (US)
Article number93
JournalAstrophysical Journal
Volume800
Issue number2
DOIs
StatePublished - Feb 20 2015

Fingerprint

active galactic nuclei
quasars
galaxies
radio
luminosity
autocorrelation
merger
observatory
accretion
filter
cross correlation
photometry
observatories
cameras
telescopes
filters

Keywords

  • galaxies: active
  • large-scale structure of universe

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Scott, J. E., Rafiee, A., Bechtold, J., Ellingson, E., Thibodeau, C., & Richmond, M. (2015). Wide field multiband imaging of low redshift quasar environments. Astrophysical Journal, 800(2), [93]. https://doi.org/10.1088/0004-637X/800/2/93

Wide field multiband imaging of low redshift quasar environments. / Scott, Jennifer E.; Rafiee, Alireza; Bechtold, Jill; Ellingson, Erica; Thibodeau, Christopher; Richmond, Michael.

In: Astrophysical Journal, Vol. 800, No. 2, 93, 20.02.2015.

Research output: Contribution to journalArticle

Scott, JE, Rafiee, A, Bechtold, J, Ellingson, E, Thibodeau, C & Richmond, M 2015, 'Wide field multiband imaging of low redshift quasar environments', Astrophysical Journal, vol. 800, no. 2, 93. https://doi.org/10.1088/0004-637X/800/2/93
Scott, Jennifer E. ; Rafiee, Alireza ; Bechtold, Jill ; Ellingson, Erica ; Thibodeau, Christopher ; Richmond, Michael. / Wide field multiband imaging of low redshift quasar environments. In: Astrophysical Journal. 2015 ; Vol. 800, No. 2.
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