2016ApJ...825L...7H

Query : 2016ApJ...825L...7H

2016ApJ...825L...7H - Astrophys. J., 825, L7-L7 (2016/July-1)

An ultraluminous Lyα emitter with a blue wing at z = 6.6.

HU E.M., COWIE L.L., SONGAILA A., BARGER A.J., ROSENWASSER B. and WOLD I.G.B.

Abstract (from CDS):

We report the detection of the most luminous high-redshift Lyα emitting galaxy (LAE) yet seen, with logL(Lyα)=43.9  erg {s}^{-1} . The galaxy-COSMOS Lyα1, 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 Lyα 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 Lyα 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 ∼ 7 IGM.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): cosmology: observations - galaxies: distances and redshifts - galaxies: evolution - galaxies: starburst

Nomenclature: NAME COLA1 N=1 = NAME COSMOS Lyalpha 1 N=1.

CDS comments: A370-6 and GN-6 were not identified.

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 825 0
2 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 2282 1
3 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 3639 0
4 COSMOS2015 338645 EmG 10 00 58.01148 +01 48 15.3000           ~ 101 0
5 COSMOS2015 809358 EmG 10 01 24.80 +02 31 45.4           ~ 19 0
6 NAME COLA1 EmG 10 02 35.380 +02 12 13.96           ~ 37 0
7 NAME Lockman Hole reg 10 45 00.0 +58 00 00           ~ 910 0
8 NAME Chandra Deep Field-North reg 12 36.8 +62 13           ~ 686 0
9 NAME GOODS-N Field reg 12 36 55.0 +62 14 15           ~ 1364 1
10 SSA 22 reg 22 17 34.7 +00 15 07           ~ 351 0

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