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arXiv 2212.04568astro-ph.GA
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z=10.3-13.2的四个贫金属星系的光谱确认

Spectroscopic confirmation of four metal-poor galaxies at z=10.3-13.2

Emma Curtis-Lake, Stefano Carniani, Alex Cameron, Stephane Charlot, Peter Jakobsen, Roberto Maiolino, Andrew Bunker, Joris Witstok, Renske Smit, Jacopo Chevalla… 展开作者

Emma Curtis-Lake, Stefano Carniani, Alex Cameron, Stephane Charlot, Peter Jakobsen, Roberto Maiolino, Andrew Bunker, Joris Witstok, Renske Smit, Jacopo Chevallard, Chris Willott, Pierre Ferruit, Santiago Arribas, Nina Bonaventura, Mirko Curti, Francesco D'Eugenio, Marijn Franx, Giovanna Giardino, Tobias J. Looser, Nora Lützgendorf, Michael V. Maseda, Tim Rawle, Hans-Walter Rix, Bruno Rodriguez del Pino, Hannah Übler, Marko Sirianni, Alan Dressler, Eiichi Egami, Daniel J. Eisenstein, Ryan Endsley, Kevin Hainline, Ryan Hausen, Benjamin D. Johnson, Marcia Rieke, Brant Robertson, Irene Shivaei, Daniel P. Stark, Sandro Tacchella, Christina C. Williams, Christopher N. A. Willmer, Rachana Bhatawdekar, Rebecca Bowler, Kristan Boyett, Zuyi Chen, Anna de Graaff, Jakob M. Helton, Raphael E. Hviding, Gareth C. Jones, Nimisha Kumari, Jianwei Lyu, Erica Nelson, Michele Perna, Lester Sandles, Aayush Saxena, Katherine A. Suess, Fengwu Sun, Michael W. Topping, Imaan E. B. Wallace, Lily Whitler

摘要:

寻找和描述在宇宙黎明时照亮早期宇宙的第一批星系对于了解导致第一批恒星形成的物理条件和过程至关重要。在运行的最初几个月里,詹姆斯·韦伯太空望远镜(JWST)的成像已经被用来识别数十个红移(z)大于10的候选星系,距离大爆炸不到4.5亿年。然而,这些候选者中没有一个还没有被光谱证实,这使得它们实际上是低红移的闯入者的可能性仍然存在。在这里,我们提出了光谱确认和分析的四个星系明确检测到的红移10.3<z<13.2,以前选择的近红外相机成像。光谱显示,这些原始星系的金属含量极低,质量在10^7到10^8太阳质量的几倍之间,而且年龄很小。阻尼翼,形状的连续体接近莱曼边缘是一致的,在这个时代完全中性的星系际介质。这些发现证明了第一代星系在宇宙黎明时的迅速出现。

英文摘要:

Finding and characterising the first galaxies that illuminated the early Universe at cosmic dawn is pivotal to understand the physical conditions and the processes that led to the formation of the first stars. In the first few months of operations, imaging from the James Webb Space Telescope (JWST) have been used to identify tens of candidates of galaxies at redshift (z) greater than 10, less than 450 million years after the Big Bang. However, none of these candidates has yet been confirmed spectroscopically, leaving open the possibility that they are actually low-redshift interlopers. Here we present spectroscopic confirmation and analysis of four galaxies unambiguously detected at redshift 10.3<z<13.2, previously selected from NIRCam imaging. The spectra reveal that these primeval galaxies are extremely metal poor, have masses between 10^7 and a few times 10^8 solar masses, and young ages. The damping wings that shape the continuum close to the Lyman edge are consistent with a fully neutral intergalactic medium at this epoch. These findings demonstrate the rapid emergence of the first generations of galaxies at cosmic dawn.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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