PRIMUS: THE RELATIONSHIP BETWEEN STAR FORMATION AND AGN ACCRETION

Mojegan Azadi, James Aird, Alison L. Coil, John Moustakas, Alexander J. Mendez, Michael R. Blanton, Richard J. Cool, Daniel J. Eisenstein, Kenneth C. Wong, Guangtun Zhu

    Research output: Contribution to journalArticle

    Abstract

    We study the evidence for a connection between active galactic nuclei (AGNs) fueling and star formation by investigating the relationship between the X-ray luminosities of AGNs and the star formation rates (SFRs) of their host galaxies. We identify a sample of 309 AGNs with 10<sup>41</sup> < L<inf>X</inf> < 10<sup>44</sup> erg s<sup>-1</sup> at 0.2 < z < 1.2 in the PRIMUS redshift survey. We find AGNs in galaxies with a wide range of SFR at a given L<inf>X</inf>. We do not find a significant correlation between SFR and the observed instantaneous L<inf>X</inf> for star-forming AGN host galaxies. However, there is a weak but significant correlation between the mean L<inf>X</inf> and SFR of detected AGNs in star-forming galaxies, which likely reflects that L<inf>X</inf> varies on shorter timescales than SFR. We find no correlation between stellar mass and L<inf>X</inf> within the AGN population. Within both populations of star-forming and quiescent galaxies, we find a similar power-law distribution in the probability of hosting an AGN as a function of specific accretion rate. Furthermore, at a given stellar mass, we find a star-forming galaxy ∼2-3 more likely than a quiescent galaxy to host an AGN of a given specific accretion rate. The probability of a galaxy hosting an AGN is constant across the main sequence of star formation. These results indicate that there is an underlying connection between star formation and the presence of AGNs, but AGNs are often hosted by quiescent galaxies.

    Original languageEnglish (US)
    Article number187
    JournalAstrophysical Journal
    Volume806
    Issue number2
    DOIs
    StatePublished - Jun 20 2015

    Fingerprint

    active galactic nuclei
    star formation
    accretion
    galaxies
    star formation rate
    stars
    power law distribution
    stellar mass
    erg
    rate
    timescale
    refueling
    luminosity

    Keywords

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

    ASJC Scopus subject areas

    • Space and Planetary Science
    • Astronomy and Astrophysics

    Cite this

    Azadi, M., Aird, J., Coil, A. L., Moustakas, J., Mendez, A. J., Blanton, M. R., ... Zhu, G. (2015). PRIMUS: THE RELATIONSHIP BETWEEN STAR FORMATION AND AGN ACCRETION. Astrophysical Journal, 806(2), [187]. https://doi.org/10.1088/0004-637X/806/2/187

    PRIMUS : THE RELATIONSHIP BETWEEN STAR FORMATION AND AGN ACCRETION. / Azadi, Mojegan; Aird, James; Coil, Alison L.; Moustakas, John; Mendez, Alexander J.; Blanton, Michael R.; Cool, Richard J.; Eisenstein, Daniel J.; Wong, Kenneth C.; Zhu, Guangtun.

    In: Astrophysical Journal, Vol. 806, No. 2, 187, 20.06.2015.

    Research output: Contribution to journalArticle

    Azadi, M, Aird, J, Coil, AL, Moustakas, J, Mendez, AJ, Blanton, MR, Cool, RJ, Eisenstein, DJ, Wong, KC & Zhu, G 2015, 'PRIMUS: THE RELATIONSHIP BETWEEN STAR FORMATION AND AGN ACCRETION', Astrophysical Journal, vol. 806, no. 2, 187. https://doi.org/10.1088/0004-637X/806/2/187
    Azadi M, Aird J, Coil AL, Moustakas J, Mendez AJ, Blanton MR et al. PRIMUS: THE RELATIONSHIP BETWEEN STAR FORMATION AND AGN ACCRETION. Astrophysical Journal. 2015 Jun 20;806(2). 187. https://doi.org/10.1088/0004-637X/806/2/187
    Azadi, Mojegan ; Aird, James ; Coil, Alison L. ; Moustakas, John ; Mendez, Alexander J. ; Blanton, Michael R. ; Cool, Richard J. ; Eisenstein, Daniel J. ; Wong, Kenneth C. ; Zhu, Guangtun. / PRIMUS : THE RELATIONSHIP BETWEEN STAR FORMATION AND AGN ACCRETION. In: Astrophysical Journal. 2015 ; Vol. 806, No. 2.
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