Abstract:
Given their extremely faint apparent brightness, the nature of the first
galaxies and how they reionized the Universe's gas are not yet understood. Here
we report the discovery, in JWST imaging, of a highly magnified, low mass
(log(Mstellar/Msun) = 7.63+0.22-0.24) galaxy visible when the Universe was only
510 Myr old, and follow-up JWST spectroscopy from Lyman alpha to [O III] 5007 A
in its rest frame. We detect the [O III] 5007 A and H Beta emission lines with
a respective signal-to-noies ratio of 40 and 7, and five additional lines with
signal-to-noise greater than 3. The galaxy's magnification of approximately 20
allows us to measure a radius of 16.4+10.7-7.0 pc, which is a factor of
9.3+10.5-4.4 (3.5 sigma) smaller than galaxies with comparable luminosity at z
= 6 - 8.
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Subject:
Astronomy
>>
Astrophysical processes
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Cite as:
ChinaXiv:202303.04177
(or this version
ChinaXiv:202303.04177V1)
DOI:10.12074/202303.04177V1
CSTR:32003.36.ChinaXiv.202303.04177.V1
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TXID：
61c11996-baa5-41e0-98e9-b534777c0502
- Recommended references：
Hayley Williams,Patrick L. Kelly,Wenlei Chen,Gabriel Brammer,Adi Zitrin,Tommaso Treu,Claudia Scarlata,Anton M. Koekemoer,Masamune Oguri,Yu-Heng Lin,Jose M. Diego,Mario Nonino,Jens Hjorth,Danial Langeroodi,Tom Broadhurst,Noah Rogers,Ismael Perez-Fournon,Ryan J. Foley,Saurabh Jha,Alexei V. Filippenko,Lou Strolger,Justin Pierel,Frederick Poidevin,Lilan Yang.A Highly Magnified and Extremely Compact Galaxy at Redshift 9.51 with
Strong Nebular Emission.中国科学院科技论文预发布平台.[ChinaXiv:202303.04177V1]
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