PRIMUS + DEEP2: CLUSTERING of X-RAY, RADIO, and IR-AGNs 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

    Research output: Contribution to journalArticle

    Abstract

    We measure the clustering of X-ray, radio, and mid-IR-selected active galactic nuclei (AGNs) at 0.2 <z <1.2 using multi-wavelength imaging and spectroscopic redshifts from the PRIMUS and DEEP2 redshift surveys, covering seven separate fields spanning ∼10deg2. Using the cross-correlation of AGNs with dense galaxy samples, we measure the clustering scale length and slope, as well as the bias, of AGNs selected at different wavelengths. Similar to previous studies, we find that X-ray and radio AGNs are more clustered than mid-IR-selected AGNs. We further compare the clustering of each AGN sample with matched galaxy samples designed to have the same stellar mass, star-formation rate (SFR), and redshift distributions as the AGN host galaxies and find no significant differences between their clustering properties. The observed differences in the clustering of AGNs 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 SFR. 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 AGNs, using IRAC or Wide-field Infrared Survey Explorer colors or X-ray hardness ratio.

    Original languageEnglish (US)
    Article number55
    JournalAstrophysical Journal
    Volume821
    Issue number1
    DOIs
    StatePublished - Apr 10 2016

    Fingerprint

    active galactic nuclei
    wavelength
    radio
    x rays
    hardness
    star formation rate
    galaxies
    stellar mass
    wavelengths
    Wide-field Infrared Survey Explorer
    distribution
    rate
    cross correlation
    coverings
    slopes
    color

    Keywords

    • galaxies: active
    • galaxies: evolution
    • infrared: galaxies
    • radio continuum: galaxies
    • X-rays: galaxies

    ASJC Scopus subject areas

    • Space and Planetary Science
    • Astronomy and Astrophysics

    Cite this

    Mendez, A. J., Coil, A. L., Aird, J., Skibba, R. A., Diamond-Stanic, A. M., Moustakas, J., ... Zhu, G. (2016). PRIMUS + DEEP2: CLUSTERING of X-RAY, RADIO, and IR-AGNs at z ∼ 0.7. Astrophysical Journal, 821(1), [55]. https://doi.org/10.3847/0004-637X/821/1/55

    PRIMUS + DEEP2 : CLUSTERING of X-RAY, RADIO, and IR-AGNs at z ∼ 0.7. / Mendez, Alexander J.; Coil, Alison L.; Aird, James; Skibba, Ramin A.; Diamond-Stanic, Aleksandar M.; Moustakas, John; Blanton, Michael R.; Cool, Richard J.; Eisenstein, Daniel J.; Wong, Kenneth C.; Zhu, Guangtun.

    In: Astrophysical Journal, Vol. 821, No. 1, 55, 10.04.2016.

    Research output: Contribution to journalArticle

    Mendez, AJ, Coil, AL, Aird, J, Skibba, RA, Diamond-Stanic, AM, Moustakas, J, Blanton, MR, Cool, RJ, Eisenstein, DJ, Wong, KC & Zhu, G 2016, 'PRIMUS + DEEP2: CLUSTERING of X-RAY, RADIO, and IR-AGNs at z ∼ 0.7', Astrophysical Journal, vol. 821, no. 1, 55. https://doi.org/10.3847/0004-637X/821/1/55
    Mendez AJ, Coil AL, Aird J, Skibba RA, Diamond-Stanic AM, Moustakas J et al. PRIMUS + DEEP2: CLUSTERING of X-RAY, RADIO, and IR-AGNs at z ∼ 0.7. Astrophysical Journal. 2016 Apr 10;821(1). 55. https://doi.org/10.3847/0004-637X/821/1/55
    Mendez, Alexander J. ; Coil, Alison L. ; Aird, James ; Skibba, Ramin A. ; Diamond-Stanic, Aleksandar M. ; Moustakas, John ; Blanton, Michael R. ; Cool, Richard J. ; Eisenstein, Daniel J. ; Wong, Kenneth C. ; Zhu, Guangtun. / PRIMUS + DEEP2 : CLUSTERING of X-RAY, RADIO, and IR-AGNs at z ∼ 0.7. In: Astrophysical Journal. 2016 ; Vol. 821, No. 1.
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    abstract = "We measure the clustering of X-ray, radio, and mid-IR-selected active galactic nuclei (AGNs) at 0.2 2. Using the cross-correlation of AGNs with dense galaxy samples, we measure the clustering scale length and slope, as well as the bias, of AGNs selected at different wavelengths. Similar to previous studies, we find that X-ray and radio AGNs are more clustered than mid-IR-selected AGNs. We further compare the clustering of each AGN sample with matched galaxy samples designed to have the same stellar mass, star-formation rate (SFR), and redshift distributions as the AGN host galaxies and find no significant differences between their clustering properties. The observed differences in the clustering of AGNs 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 SFR. 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 AGNs, using IRAC or Wide-field Infrared Survey Explorer colors or X-ray hardness ratio.",
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    AU - Blanton, Michael R.

    AU - Cool, Richard J.

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