We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Clustering of quasars in a wide luminosity range at redshift 4 with Subaru Hyper Suprime-Cam Wide-field imaging.
- Authors
Wanqiu HE; Masayuki AKIYAMA; James BOSCH; Motohiro ENOKI; Yuichi HARIKANE; Hiroyuki IKEDA; Nobunari KASHIKAWA; Toshihiro KAWAGUCHI; Yutaka KOMIYAMA; Chien-Hsiu LEE; Yoshiki MATSUOKA; Satoshi MIYAZAKI; Tohru NAGAO; Masahiro NAGASHIMA; Mana NIIDA; Atsushi J NISHIZAWA; Masamune OGURI; Masafusa ONOUE; Taira OOGI; Masami OUCHI
- Abstract
We examine the clustering of quasars over a wide luminosity range, by utilizing 901 quasars at z¯¯¯phot~3.8 with -24.73<M1450<-22.23 photometrically selected from the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) S16A Wide2 date release and 342 more luminous quasars at 3.4<zspec<4.6 having -28.0<M1450<-23.95 from the Sloan Digital Sky Survey (SDSS) that fall in the HSC survey fields. We measure the bias factors of two quasar samples by evaluating the cross-correlation functions (CCFs) between the quasar samples and 25790 bright z~4 Lyman Break Galaxies (LBGs) in M1450<-21.25 photometrically selected from the HSC dataset. Over an angular scale of \timeform{10.0"} to \timeform{1000.0"}, the bias factors are 5.93+1.34-1.43 and 2.73+2.44-2.55 for the low and high luminosity quasars, respectively, indicating no luminosity dependence of quasar clustering at z~4. It is noted that the bias factor of the luminous quasars estimated by the CCF is smaller than that estimated by the auto-correlation function (ACF) over a similar redshift range, especially on scales below \timeform{40.0"}. Moreover, the bias factor of the less-luminous quasars implies the minimal mass of their host dark matter halos (DMHs) is 0.3-2×1012h-1M⊙, corresponding to a quasar duty cycle of 0.001-0.06.
- Subjects
QUASARS; ASTRONOMICAL photometry; ASTRONOMICAL surveys; ASTRONOMICAL catalogs; RADIO sources (Astronomy); DARK matter; GALACTIC halos; GALACTIC redshift
- Publication
Publications of the Astronomical Society of Japan, 2018, Vol 70, Issue Supp1, p1
- ISSN
0004-6264
- Publication type
Article
- DOI
10.1093/pasj/psx129