SIMBAD references

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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