Environments around quasars at $z\sim$3 revealed by wide-field imaging with Subaru HSC and CFHT

Abstract

We examine the local density environments around 67 quasars at $z\sim 3$, by combining the imaging data of Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) and Canada-France-Hawaii Telescope Large Area U-band Survey (CLAUDS) over about 20 deg${}^2$. Our measurements exploit $U$-dropout galaxies in the vicinities of quasars taken from Sloan Digital Sky Survey (SDSS). We find that the quasars have the indistinguishable surrounding density distribution from the $U$-dropout galaxies, and that three quasars are associated with protocluster candidates within a projected separation of 3 arcmin. According to a halo evolutionary model, our results suggest that quasars at this epoch occupy haloes with a typical mass of $1.3_{-0.9}^{+1.4}\times 10^{13}{h}^{-1}{\mathrm{M}}_{\odot }$. We also investigate the dependence of the local galaxy overdensity on ultraviolet (UV) luminosities, black hole (BH) masses, and proximity zone sizes of the quasars, but no statistically-significant correlation was found. Finally, we find that the local density of faint $U$-dropout galaxies are lower than that of bright $U$-dropout galaxies within a projected distance of $0.51\pm 0.05$ physical Mpc, where the quasar UV radiation is 30 times intenser than backgroung UV radiation. We argue that photoevaporation may suppress galaxy formation at short distances where the quasar UV intensity is strong, even in massive haloes.

11 pages, 6 figures, Accepted for publication in ApJ

References in corpus (10)

• The MUSE second-generation VLT instrument
• The Sloan Digital Sky Survey Quasar Catalog: Sixteenth Data Release
• Clustering of High Redshift ($z\ge 2.9$) Quasars from the Sloan Digital Sky Survey
• Third Data Release of the Hyper Suprime-Cam Subaru Strategic Program
• The Habitat Segregation between Lyman Break Galaxies and Lyman alpha Emitters around a QSO at z~5
• MUSE Analysis of Gas around Galaxies (MAGG) -- III: The gas and galaxy environment of z = 3-4.5 quasars
• No excess of bright galaxies around the redshift 7.1 quasar ULAS J1120+0641
• The Mass of Quasars
• Active Galactic Nucleus Environments and Feedback to Neighboring Galaxies at $z\sim 5$ Probed by Lyman-Alpha Emitters
• Can luminous Lyman alpha emitters at $z$ $\simeq$ 5.7 and $z$ $\simeq$ 6.6 suppress star formation?

Cited by in corpus (1)

• Environment of SDSS quasars at $z=0.4$$-$$1.0$ explored by Subaru HSC