A magnified compact galaxy at redshift 9.51 with strong nebular emission lines

• 成果类型: Article
• 署名作者: Williams, Hayley; Kelly, Patrick L.; Chen, Wenlei; Brammer, Gabriel; Zitrin, Adi; Treu, Tommaso; Scarlata, Claudia; Koekemoer, Anton M.; Oguri, Masamune; Lin, Yu-Heng; Diego, Jose M.; Nonino, Mario; Hjorth, Jens; Langeroodi, Danial; Broadhurst, Tom; Rogers, Noah; Perez-Fournon, Ismael; Foley, Ryan J.; Jha, Saurabh; Filippenko, Alexei, V; Strolger, Lou; Pierel, Justin; Poidevin, Frederick; Yang, Lilan
• 署名单位: University of Minnesota System; University of Minnesota Twin Cities; University of Copenhagen; Niels Bohr Institute; Ben-Gurion University of the Negev; University of California System; University of California Los Angeles; Space Telescope Science Institute; Chiba University; Chiba University; Consejo Superior de Investigaciones Cientificas (CSIC); Universidad de Cantabria; CSIC - Instituto de Fisica de Cantabria (IFCA); Istituto Nazionale Astrofisica (INAF); University of Copenhagen; Niels Bohr Institute; University of Basque Country; Basque Foundation for Science; Instituto de Astrofisica de Canarias; Universidad de la Laguna; University of California System; University of California Santa Cruz; Rutgers University System; Rutgers University New Brunswick; University of California System; University of California Berkeley; University of Tokyo
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-13320
• DOI: 10.1126/science.adf5307
• 发表日期: 2023-04-28
• 页码: 416-420
• 关键词: mass-metallicity relation; spectroscopy; reionization; EVOLUTION; universe; scales; jwst; 1st; i.

摘要

Ultraviolet light from early galaxies is thought to have ionized gas in the intergalactic medium. However, there are few observational constraints on this epoch because of the faintness of those galaxies and the redshift of their optical light into the infrared. We report the observation, in JWST imaging, of a distant galaxy that is magnified by gravitational lensing. JWST spectroscopy of the galaxy, at rest-frame optical wavelengths, detects strong nebular emission lines that are attributable to oxygen and hydrogen. The measured redshift is z = 9.51 +/- 0.01, corresponding to 510 million years after the Big Bang. The galaxy has a radius of 16.2+4.6-7.2 parsecs, which is substantially more compact than galaxies with equivalent luminosity at z similar to 6 to 8, leading to a high star formation rate surface density.