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

PASJ: Publications of the Astronomical Society of Japan

He, Wanqiu¹  Akiyama, Masayuki¹  Miyazaki, Satoshi²  Toba, Yoshiki²  Oguri, Masamune²  Komiyama, Yutaka²  Bosch, James³  Lee, Chien-Hsiu⁴  Shirasaki, Yuji⁵  Ikeda, Hiroyuki⁵  Enoki, Motohiro⁶  Oogi, Taira⁷  Ouchi, Masami⁸  Schulze, Andreas⁹  Yamashita, Takuji^1,10  Harikane, Yuichi^1,10  Tanaka, Manobu M^1,11  Uchiyama, Hisakazu^1,11  Matsuoka, Yoshiki^1,12  Nagashima, Masahiro^1,12  Nishizawa, Atsushi J^1,12  Tanaka, Masayuki^1,12  Kashikawa, Nobunari^1,12  Kawaguchi, Toshihiro^1,12  Niida, Mana^1,13  Onoue, Masafusa^1,13  Silverman, John D^1,14  Nagao, Tohru^1,15 

[1] Astronomical Institute, Tohoku University, Aramaki, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan;Department of Astronomy, School of Science, SOKENDAI (The Graduate University for Advanced Studies), 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan;Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USA;Department of Economics, Management and Information Science, Onomichi City University, 1600-2 Hisayamada, Onomichi, Hiroshima 722-8506, Japan;Department of Physics, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan;Faculty of Business Administration, Tokyo Keizai University, 1-7-34 Minami-cho, Kokubunji-shi, Tokyo 185-8502, Japan;Faculty of Education, Bunkyo University, 3337 Minami-Ogishima, Koshigaya-shi, Saitama 343-8511, Japan;Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan;Institute for Advanced Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan;Institute for Cosmic Ray Research, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8582, Japan;Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, Japan;National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan;Research Center for Space and Cosmic Evolution, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan;Research Center for the Early Universe, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan;Subaru Telescope, NAOJ, 650 N’Aohoku Pl, Hilo, HI 96720, USA

关键词: galaxies: active;    galaxies: evolution;    galaxies: high-redshift;    cosmology: observations;    (cosmology:) large-scale structure of universe;   

DOI  :  10.1093/pasj/psx129

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

We examine the clustering of quasars over a wide luminosity range, by utilizing 901 quasars at |$\overline{z}_{\rm phot}\sim 3.8$| 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|${^{\prime\prime}_{.}}$|0 to 1000|${^{\prime\prime}_{.}}$|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|${^{\prime\prime}_{.}}$|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−1 M⊙, corresponding to a quasar duty cycle of 0.001–0.06.

【 授权许可】

CC BY