Clustering of quasars in a wide luminosity range at redshift 4 with Subaru Hyper Suprime-Cam Wide-field imaging

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 OuchiAndreas Schulze, Yuji Shirasaki, John D. Silverman, Manobu M. Tanaka, Masayuki Tanaka, Yoshiki Toba, Hisakazu Uchiyama, Takuji Yamashita

研究成果: Article査読

17 被引用数 (Scopus)

抄録

We examine the clustering of quasars over a wide luminosity range, by utilizing 901 quasars at zphot ∼ 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 with -28.0 < M1450 < -23.95 from the Sloan Digital Sky Survey 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 in M1450 < -21.25 photometrically selected from the HSC dataset. Over an angular scale of 10.0 to 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 significant 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 over a similar redshift range, especially on scales below 40.0. Moreover, the bias factor of the less-luminous quasars implies the minimal mass of their host dark matter halos is 0.3-2 × 1012 h-1M, corresponding to a quasar duty cycle of 0.001-0.06.

本文言語English
論文番号S33
ジャーナルPublications of the Astronomical Society of Japan
70
Special Issue 1
DOI
出版ステータスPublished - 2018 1 1

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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