Spectroscopic confirmation of a gravitationally lensed Lyman-break galaxy at z[C II]=6.827 using NOEMA

被引：8

作者：

Molyneux, S. J. ^{[1
,2
]}

Smit, R. ^{[1
]}

Schaerer, D. ^{[3
,4
]}

Bouwens, R. J. ^{[5
]}

Bradley, L. ^{[6
]}

Hodge, J. A. ^{[5
]}

Longmore, S. N. ^{[1
]}

Schouws, S. ^{[5
]}

van der Werf, P. ^{[5
]}

Zitrin, A. ^{[7
]}

Phillips, S. ^{[1
]}

机构：

[1] Liverpool John Moores Univ, Astrophys Res Inst, Liverpool L3 5RF, Merseyside, England

[2] European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany

[3] Univ Geneva, Observ Geneve, 51 Ch Mail Lettes, CH-1290 Versoix, Switzerland

[4] CNRS, IRAP, 14 Ave E Belin, F-31400 Toulouse, France

[5] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands

[6] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[7] Ben Gurion Univ Negev, Phys Dept, POB 653, IL-8410501 Beer Sheva, Israel

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2022年 / 512卷 / 01期

基金：

美国国家科学基金会;

关键词：

galaxies: evolution; galaxies: formation; galaxies: high-redshift; SIMILAR-TO; 7; LENSING CLUSTER SURVEY; STAR-FORMATION; REDSHIFT; EMISSION; REIONIZATION; BRIGHT; ALPHA; DUSTY; CONSTRAINTS;

D O I：

10.1093/mnras/stac557

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the spectroscopic confirmation of the brightest known gravitationally lensed Lyman-break galaxy in the Epoch of Reionization (EoR), A1703-zD1, through the detection of [C II] 158 mu m at a redshift of z = 6.8269 +/- 0.0004. This source was selected behind the strong lensing cluster Abell 1703, with an intrinsic luminosity and a very blue Spitzer/Infrared Array Camera (IRAC) [3.6]-[4.5] colour, implying high equivalent width line emission of [O III] + H beta. [C II] is reliably detected at 6.1 sigma cospatial with the rest-frame ultraviolet (UV) counterpart, showing similar spatial extent. Correcting for the lensing magnification, the [C II] luminosity in A1703-zD1 is broadly consistent with the local L-[C II]-star formation rate (SFR) relation. We find a clear velocity gradient of 103 +/- 22 km s(-1) across the source that possibly indicates rotation or an ongoing merger. We furthermore present spectral scans with no detected [C II] above 4.6 sigma in two unlensed Lyman-break galaxies in the Extended Groth Strip (EGS)-Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) field at z similar to 6.6-6.9. This is the first time that the Northern Extended Millimeter Array (NOEMA) has been successfully used to observe [C II] in a 'normal' star-forming galaxy at z > 6, and our results demonstrate its capability to complement the Atacama Large Millimeter/submillimeter Array (ALMA) in confirming galaxies in the EoR.

引用

页码：535 / 543

页数：9

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