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26 April 2024 |
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PRIMUS + DEEP2: Clustering of X-ray, Radio and IR-AGN at z~0.7 | | Alexander J. Mendez
; Alison L. Coil
; James Aird
; Ramin A. Skibba
; Aleksandar M. Diamond-Stanic
; John Moustakas
; Michael R. Blanton
; Richard J. Cool
; Daniel J. Eisenstein
; Kenneth C. Wong
; Guangtun Zhu
; | | Date: |
23 Apr 2015 | | Abstract: | We measure the clustering of X-ray, radio, and mid-IR-selected active
galactic nuclei (AGN) at 0.2 < z < 1.2 using multi-wavelength imaging and
spectroscopic redshifts from the PRIMUS and DEEP2 redshift surveys, covering 7
separate fields spanning ~10 square degrees. Using the cross-correlation of AGN
with dense galaxy samples, we measure the clustering scale length and slope, as
well as the bias, of AGN selected at different wavelengths. Similar to previous
studies, we find that X-ray and radio AGN are more clustered than
mid-IR-selected AGN. We further compare the clustering of each AGN sample with
matched galaxy samples designed to have the same stellar mass, star formation
rate, and redshift distributions as the AGN host galaxies and find no
significant differences between their clustering properties. The observed
differences in the clustering of AGN selected at different wavelengths can
therefore be explained by the clustering differences of their host populations,
which have different distributions in both stellar mass and star formation
rate. Selection biases inherent in AGN selection, therefore, determine the
clustering of observed AGN samples. We further find no significant difference
between the clustering of obscured and unobscured AGN, using IRAC or WISE
colors or X-ray hardness ratio. | | Source: | arXiv, 1504.6284 | | Services: | Forum | Review | PDF | Favorites | |
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