Galaxy and Mass Assembly (GAMA): The Weak Environmental Dependence of Quasar Activity at 0.1<z<0.35

Abstract

Understanding the connection between nuclear activity and galaxy environment remains critical in constraining models of galaxy evolution. By exploiting extensive catalogued data from the Galaxy and Mass Assembly (GAMA) survey, we identify a representative sample of 205 quasars at 0.1 < z < 0.35 and establish a comparison sample of galaxies, closely matched to the quasar sample in terms of both stellar mass and redshift. On scales <1 Mpc, the galaxy number counts and group membership of quasars appear entirely consistent with those of the matched galaxy sample. Despite this, we find that quasars are ~1.5 times more likely to be classified as the group center, indicating a potential link between quasar activity and cold gas flows or galaxy interactions associated with rich group environments. On scales of ~a few Mpc, the clustering strength of both samples are statistically consistent and beyond 10 Mpc we find no evidence that quasars trace large scale structures any more than the galaxy control sample. Both populations are found to prefer intermediate-density sheets and filaments to either very high- or very low- density environments. This weak dependence of quasar activity on galaxy environment supports a paradigm in which quasars represent a phase in the lifetime of all massive galaxies and in which secular processes and a group-centric location are the dominant trigger of quasars at low redshift.

26 pages, 20 figures, accepted to ApJ

References in corpus (13)

• The bulk of the black hole growth since z~1 occurs in a secular universe: No major merger-AGN connection
• How special are Brightest Group and Cluster Galaxies?
• Galaxy And Mass Assembly (GAMA): the G02 field, Herschel-ATLAS target selection and Data Release 3
• Galaxy And Mass Assembly (GAMA): The galaxy stellar mass function to $z=0.1$ from the r-band selected equatorial regions
• Black Hole Mass Scaling Relations for Early-Type Galaxies: $M_{BH}$-$M_{\ast ,sph}$ and $M_{BH}$-$M_{\ast ,gal}$
• The Small-Scale Environment of Quasars
• Galaxy And Mass Assembly (GAMA): The galaxy luminosity function within the cosmic web
• Environmental dependence of AGN activity in the supercluster A901/2
• Properties of galaxies in SDSS Quasar environments at z < 0.2
• Star formation in galaxies falling into clusters along supercluster-scale filaments
• Low redshift quasars in the SDSS Stripe 82. The local environments
• The co-evolution of black hole growth and star formation from a cross-correlation analysis between quasars and the cosmic infrared background
• Quasar Sightline and Galaxy Evolution (QSAGE) survey -- II. Galaxy overdensities around UV luminous quasars at z=1-2

Cited by in corpus (5)

• Galaxy and Mass Assembly (GAMA): Low-redshift Quasars and Inactive Galaxies Have Similar Neighbors
• The miniJPAS Survey: The radial distribution of star formation rates in faint X-ray active galactic nuclei
• Low-redshift quasars in the SDSS Stripe 82 -- III MOS observations
• The Nature of LoBAL QSOs: II. HST/WFC3 Observations Reveal Host Galaxies Dominated by Mergers
• Environment of SDSS quasars at $z=0.4$$-$$1.0$ explored by Subaru HSC