2019ApJ...876..123Y

Query : 2019ApJ...876..123Y

2019ApJ...876..123Y - Astrophys. J., 876, 123-123 (2019/May-2)

Lyα galaxies in the epoch of reionization (LAGER): spectroscopic confirmation of two redshift ∼7.0 galaxies.

YANG H., INFANTE L., RHOADS J.E., HU W., ZHENG Z., MALHOTRA S., WANG J., BARRIENTOS L.F., KANG W. and JIANG C.

Abstract (from CDS):

We spectroscopically confirmed two narrowband-selected redshift 7.0 Lyα galaxies and studied their rest-frame UV spectra. The Lyα and other UV nebular lines are very useful to confirm the galactic redshifts and diagnose the different mechanisms driving the ionizing emission. We observed two narrowband-selected z = 7.0 Lyα candidates in the LAGER Chandra Deep Field South (CDFS) field with IMACS at the Magellan telescope and confirmed they are Lyα emitters at z = 6.924 and 6.931. In one galaxy, we also obtained deep near-infrared (NIR) spectroscopy, which yields non-detections of the high-ionization UV nebular lines. We measured the upper limits of the ratios of C IVλ1548/Lyα, He IIλ1640/Lyα, O III]λ1660/Lyα, and C III]λ1909/Lyα from the NIR spectra. These upper limits imply that the ionizing emission in this galaxy is dominated by normal star formation instead of an active galactic nucleus.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): dark ages, reionization, first stars - galaxies: high-redshift

Nomenclature: Text: [YIR2019] CDFS-LAENN (Nos 1 and 51).

Simbad objects: 4

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Number of rows : 4
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 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 2282 1
2 [YIR2019] CDFS-LAE51 EmG 03 32 51.680 -28 32 42.51           ~ 1 0
3 [YIR2019] CDFS-LAE1 EmG 03 33 05.950 -28 24 59.10           ~ 3 0
4 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 3639 0

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