SILVERRUSH. V. Census of Lyα, [O III] λ5007, Hα, and [C II] 158 μm Line Emission with ∼1000 LAEs at z=4.9-7.0 Revealed with Subaru/HSC

被引：99

作者：

Harikane, Yuichi ^{[1
,2
]}

Ouchi, Masami ^{[1
,3
]}

Shibuya, Takatoshi ^{[1
,4
]}

Kojima, Takashi ^{[1
,2
]}

Zhang, Haibin ^{[1
,2
]}

Itoh, Ryohei ^{[1
,2
]}

Ono, Yoshiaki ^{[1
]}

Higuchi, Ryo ^{[1
,2
]}

Inoue, Akio K. ^{[5
]}

Chevallard, Jacopo ^{[6
]}

Capak, Peter L. ^{[7
,8
]}

Nagao, Tohru ^{[9
]}

Onodera, Masato ^{[10
]}

Faisst, Andreas L. ^{[8
]}

Martin, Crystal L. ^{[11
]}

Rauch, Michael ^{[12
]}

Bruzual, Gustavo A. ^{[13
]}

Charlot, Stephane ^{[14
]}

Davidzon, Iary ^{[8
]}

Fujimoto, Seiji ^{[1
,15
]}

Hilmi, Miftahul ^{[1
,15
]}

Ilbert, Olivier ^{[16
]}

Lee, Chien-Hsiu ^{[10
]}

Matsuoka, Yoshiki ^{[9
]}

Silverman, John D. ^{[3
]}

Toft, Sune ^{[17
]}

机构：

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

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

[3] Univ Tokyo, Kavli Inst Phys & Math Universe, WPI, Kashiwa, Chiba 2778583, Japan

[4] Kitami Inst Technol, Dept Comp Sci, 165 Koen Cho, Kitami, Hokkaido 0908507, Japan

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

[6] ESA ESTEC, Directorate Sci & Robot Explorat, Sci Support Off, Keplerlaan 1, NL-2201 AZ Noordwijk, Netherlands

[7] CALTECH, MC 105-24,1200 East Calif Blvd, Pasadena, CA 91125 USA

[8] CALTECH, Infrared Proc & Anal Ctr, MC 100-22,770 South Wilson Ave, Pasadena, CA 91125 USA

[9] Ehime Univ, Res Ctr Space & Cosm Evolut, Bunkyo Cho, Matsuyama, Ehime 7908577, Japan

[10] Natl Astron Observ Japan, Subaru Telescope, 650 North Aohoku Pl, Hilo, HI 96720 USA

[11] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[12] Carnegie Observ, 813 Santa Barbara St, Pasadena, CA 91101 USA

[13] UNAM, Ctr Radioastron & Astrofis CRyA, Campus Morelia Apartado Postal 3-72, Morelia 58089, Michoacan, Mexico

[14] Sorbonne Univ, UPMC CNRS, UMR7095, Inst Astrophys Paris, F-75014 Paris, France

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

[16] Aix Marseille Univ, CNRS, LAM, Marseille, France

[17] Niels Bohr Inst, Cosm Dawn Ctr DAWN, Juliane Mariesvej 30, DK-2100 Copenhagen, Denmark

来源：

ASTROPHYSICAL JOURNAL | 2018年 / 859卷 / 02期

基金：

欧洲研究理事会; 美国国家航空航天局; 美国国家科学基金会; 日本学术振兴会; 新加坡国家研究基金会; 日本科学技术振兴机构;

关键词：

galaxies: evolution; galaxies: formation; galaxies: high-redshift; STAR-FORMING GALAXIES; UV LUMINOSITY FUNCTIONS; HALF-MILLION DROPOUTS; SIMILAR-TO; ESCAPE FRACTION; STELLAR POPULATIONS; INTERSTELLAR-MEDIUM; REDSHIFT EVOLUTION; IONIZING PHOTONS; NEBULAR EMISSION;

D O I：

10.3847/1538-4357/aabd80

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate Ly alpha, [O III] lambda 5007, H alpha, and [C II] 158 mu m emission from 1124 galaxies at z = 4.9-7.0. Our sample is composed of 1092 Ly alpha emitters (LAEs) at z = 4.9, 5.7, 6.6, and 7.0 identified by Subaru/Hyper-Suprime-Cam (HSC) narrowband surveys covered by Spitzer Large Area Survey with Hyper-Suprime-Cam (SPLASH) and 34 galaxies at z = 5.148-7.508 with deep ALMA [C II] 158 mu m data in the literature. Fluxes of strong rest-frame optical lines of [O III] and H alpha (H beta) are constrained by significant excesses found in the SPLASH 3.6 and 4.5 mu m photometry. At z = 4.9, we find that the rest-frame H alpha equivalent width and the Ly alpha escape fraction f(Ly alpha) positively correlate with the rest-frame Ly alpha equivalent width EWLy alpha 0. The f(Ly alpha)-EWLy alpha 0 correlation is similarly found at z similar to 0-2, suggesting no evolution of the correlation over z similar or equal to 0-5. The typical ionizing photon production efficiency of LAEs is log(xi(ion)/[Hz erg(-1)]) similar or equal to 25.5, significantly (60%-100%) higher than those of LBGs at a given UV magnitude. At z = 5.7-7.0, there exists an interesting turnover trend that the [O III]/H alpha flux ratio increases in EWLy alpha 0, similar or equal to 0-30 angstrom and then decreases out to EWLy alpha 0 similar or equal to 130 angstrom. We also identify an anticorrelation between a ratio of [C II] luminosity to star formation rate (L-[C II]/SFR) and EWLy alpha 0 at the >99% confidence level. We carefully investigate physical origins of the correlations with stellar-synthesis and photoionization models and find that a simple anticorrelation between EWLy alpha 0, and metallicity explains self-consistently all of the correlations of Ly alpha, H alpha, [O III]/H alpha, and [C II] identified in our study, indicating detections of metal-poor (similar to 0.03 Z(circle dot)) galaxies with EWLy alpha 0, similar or equal to 200 angstrom.

引用

页数：21

共 161 条

[51] Detection of an oxygen emission line from a high-redshift galaxy in the reionization epoch [J].