2017ApJ...836L...2B

Query : 2017ApJ...836L...2B

2017ApJ...836L...2B - Astrophys. J., 836, L2-L2 (2017/February-2)

ALMA C II 158 µm detection of a redshift 7 lensed galaxy behind RX J1347.1-1145.

BRADAC M., GARCIA-APPADOO D., HUANG K.-H., VALLINI L., FINNEY E.Q., HOAG A., LEMAUX B.C., SCHMIDT K.B., TREU T., CARILLI C., DIJKSTRA M., FERRARA A., FONTANA A., JONES T., RYAN R., WAGG J. and GONZALEZ A.H.

Abstract (from CDS):

We present the results of ALMA spectroscopic follow-up of a z = 6.766 Lyα emitting galaxy behind the cluster RX J1347.1-1145. We report the detection of [C II] 158 µm line fully consistent with the Lyα redshift and with the peak of the optical emission. Given the magnification of µ = 5.0 ± 0.3, the intrinsic (corrected for lensing) luminosity of the [C II] line is L_[C II]_ = 1.4–0.3+0.2×107 L☉, roughly ∼5 times fainter than other detections of z ∼ 7 galaxies. The result indicates that low L_[C II]_ in z ∼ 7 galaxies compared to the local counterparts might be caused by their low metallicities and/or feedback. The small velocity offset (Δv=20–40+140 km s–1) between the Lyα and [C II] line is unusual, and may be indicative of ionizing photons escaping.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): dark ages, reionization, first stars - galaxies: clusters: individual: RX J1347.1-1145 - galaxies: high-redshift - gravitational lensing: strong - gravitational lensing: strong

Simbad objects: 7

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Number of rows : 7
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 Himiko EmG 02 17 57.6122 -05 08 44.898           ~ 113 0
2 NAME Hubble Ultra Deep Field reg 03 32 39.0 -27 47 29           ~ 1900 0
3 [BBZ2012] A1703-zD6 EmG 13 15 01.0068 +51 50 04.353           ~ 33 0
4 QSO B1334-127 Bla 13 37 39.78278132 -12 57 24.6933925   18.5 19.00 16.22   ~ 540 1
5 ClG J1347-1145 ClG 13 47 30.5 -11 45 07           ~ 577 0
6 [FLB2020] RXJ1347.47 EmG 13 47 36.204 -11 45 15.12           ~ 18 0
7 QSO B1352-104 Bla 13 54 46.51868700 -10 41 02.6561979   18.20 18.4     ~ 175 1

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