AN ULTRALUMINOUS LYα EMITTER WITH A BLUE WING AT z=6.6

被引：64

作者：

Hu, E. M. ^{[1
]}

Cowie, L. L. ^{[1
]}

Songaila, A. ^{[1
]}

Barger, A. J. ^{[1
,2
,3
]}

Rosenwasser, B. ^{[2
]}

Wold, I. G. B. ^{[4
]}

机构：

[1] Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA

[2] Univ Wisconsin, Dept Astron, 475 N Charter St, Madison, WI 53706 USA

[3] Univ Hawaii, Dept Phys & Astron, 2505 Correa Rd, Honolulu, HI 96822 USA

[4] Univ Texas Austin, Dept Astron, 2515 Speedway Blvd,Stop C1400, Austin, TX 78712 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2016年 / 825卷 / 01期

关键词：

cosmology: observations; galaxies: distances and redshifts; galaxies: evolution; galaxies: starburst; STAR-FORMING GALAXIES; INTERGALACTIC MEDIUM; HIGH-REDSHIFT; REIONIZATION; EMISSION; SPECTROSCOPY; EVOLUTION; UNIVERSE;

D O I：

10.3847/2041-8205/825/1/L7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the detection of the most luminous high-redshift Ly alpha emitting galaxy (LAE) yet seen, with log L(Ly alpha) = 43.9 erg s(-1). The galaxy-COSMOS Ly alpha 1, or COLA1-was detected in a search for ultraluminous LAEs with Hyper Suprime-Cam on the Subaru telescope. It was confirmed as lying at z = 6.593, based on a Ly alpha line detection obtained from follow-up spectroscopy with the DEIMOS spectrograph on Keck II. COLA1 is the first very high-redshift LAE to show a multi-component Ly alpha line profile with a blue wing, which suggests that it could lie in a highly ionized region of the intergalactic medium (IGM) and could have significant infall. If this interpretation is correct, then ultraluminous LAEs like COLA1 offer a unique opportunity to determine the properties of the H II regions around these galaxies, which will help in understanding the ionization of the z similar to 7 IGM.

引用

页数：5

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