Systematic Identification of LAEs for Visible Exploration and Reionization Research Using Subaru HSC (SILVERRUSH). I. Program strategy and clustering properties of ∼2000 Lyα emitters at z=6-7 over the 0.3-0.5 Gpc2 survey area

被引：179

作者：

Ouchi, Masami ^{[1
,2
]}

Harikane, Yuichi ^{[1
,3
]}

Shibuya, Takatoshi ^{[1
]}

Shimasaku, Kazuhiro ^{[4
,5
]}

Taniguchi, Yoshiaki ^{[6
]}

Konno, Akira ^{[1
,4
]}

Kobayashi, Masakazu ^{[7
]}

Kajisawa, Masaru ^{[8
]}

Nagao, Tohru ^{[8
]}

Ono, Yoshiaki ^{[1
]}

Inoue, Akio K. ^{[9
]}

Umemura, Masayuki ^{[10
]}

Mori, Masao ^{[10
]}

Hasegawa, Kenji ^{[11
]}

Higuchi, Ryo ^{[1
]}

Komiyama, Yutaka ^{[12
,13
]}

Matsuda, Yuichi ^{[12
,13
]}

Nakajima, Kimihiko ^{[14
]}

Saito, Tomoki ^{[15
]}

Wang, Shiang-Yu ^{[16
]}

机构：

[1] Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778582, Japan

[2] Univ Tokyo, Kavli IPMU, WPI, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778583, Japan

[3] Univ Tokyo, Grad Sch Sci, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan

[4] Univ Tokyo, Grad Sch Sci, Dept Astron, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan

[5] Univ Tokyo, Grad Sch Sci, Res Ctr Early Universe, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan

[6] Open Univ Japan, Mihama Ku, Wakaba 2-11, Chiba 2618586, Japan

[7] Kure Coll, Natl Inst Technol, Fac Nat Sci, 2-2-11 Agaminami, Kure, Hiroshima 7378506, Japan

[8] Ehime Univ, Res Ctr Space & Cosm Evolut, 2-5 Bunkyo Cho, Matsuyama, Ehime 7908577, Japan

[9] Osaka Sangyo Univ, Fac Design Technol, Dept Environm Sci & Technol, 3-1-1 Nagaito, Daito, Osaka 5748530, Japan

[10] Univ Tsukuba, Ctr Computat Sci, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058577, Japan

[11] Nagoya Univ, Dept Phys & Astrophys, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648602, Japan

[12] Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

[13] Grad Univ Adv Studies SOKENDAI, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

[14] European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany

[15] Univ Hyogo, Ctr Astron, Nishi Harima Astron Observ, 407-2 Nishigaichi,Sayo Cho, Sayo, Hyogo 6795313, Japan

[16] Acad Sinica, Inst Astron & Astrophys, 11F AS NTU Astron Math Bldg,1,Sec 4,Roosevelt Rd, Taipei 10617, Taiwan

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2018年 / 70卷

基金：

日本学术振兴会; 美国国家航空航天局; 美国国家科学基金会; 日本科学技术振兴机构;

关键词：

cosmology: observations; galaxies: formation; galaxies: high-redshift; LYMAN-BREAK GALAXIES; HALF-MILLION DROPOUTS; LARGE-SCALE STRUCTURE; LUMINOSITY FUNCTIONS; EMITTING GALAXIES; DEEP SURVEY; NEUTRAL FRACTION; REDSHIFT; EVOLUTION; EPOCH;

D O I：

10.1093/pasj/psx074

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the SILVERRUSH program strategy and clustering properties investigated with similar to 2000 Ly alpha emitters (LAEs) at z = 5.7 and 6.6 found in the early data of the Hyper Suprime-Cam (HSC) Subaru Strategic Program survey exploiting the carefully designed narrow-band filters. We derive angular correlation functions with the unprecedentedly large samples of LAEs at z = 6-7 over the large total area of 14-21 deg(2) corresponding to 0.3-0.5 comoving Gpc(2). We obtain the average large-scale bias values of b(avg) = 4.1 +/- 0.2 (4.5 +/- 0.6) at z = 5.7 (z = 6.6) for greater than or similar to L* LAEs, indicating a weak evolution of LAE clustering from z = 5.7 to 6.6. We compare the LAE clustering results with two independent theoretical models that suggest an increase of an LAE clustering signal by the patchy ionized bubbles at the epoch of reionization (EoR), and estimate the neutral hydrogen fraction to be x(HI) = 0.15-(+0.15)(0.15) at z = 6.6. Based on the halo occupation distributionmodels, we find that the greater than or similar to L* LAEs are hosted by dark-matter halos with an average mass of log(< M-h/M-circle dot >) = 11.1(-0.4)(+0.2) (10.8(-0.5)(+0.3)) at z = 5.7 (6.6) with a Ly alpha duty cycle of 1% or less, where the results of z = 6.6 LAEs may be slightly biased, due to the increase of the clustering signal at the EoR. Our clustering analysis reveals the low-mass nature of greater than or similar to L* LAEs at z = 6-7, and that these LAEs probably evolve into massive super-L* galaxies in the present-day universe.

引用

页数：16

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