A recently quenched galaxy 700 million years after the Big Bang
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2023
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| author | Looser, Tobias J. D'Eugenio, Francesco Maiolino, Roberto Witstok, Joris Sandles, Lester Curtis-Lake, Emma Chevallard, Jacopo Tacchella, Sandro Johnson, Benjamin D. Baker, William M. Suess, Katherine A. Carniani, Stefano Ferruit, Pierre Arribas, Santiago Bonaventura, Nina Bunker, Andrew J. Cameron, Alex J. Charlot, Stephane Curti, Mirko de Graaff, Anna Maseda, Michael V. Rawle, Tim Rix, Hans-Walter Del Pino, Bruno Rodriguez Smit, Renske Übler, Hannah Willott, Chris Alberts, Stacey Egami, Eiichi Eisenstein, Daniel J. Endsley, Ryan Hausen, Ryan Rieke, Marcia Robertson, Brant Shivaei, Irene Williams, Christina C. Boyett, Kristan Chen, Zuyi Ji, Zhiyuan Jones, Gareth C. Kumari, Nimisha Nelson, Erica Perna, Michele Saxena, Aayush Scholtz, Jan |
| author_facet | Looser, Tobias J. D'Eugenio, Francesco Maiolino, Roberto Witstok, Joris Sandles, Lester Curtis-Lake, Emma Chevallard, Jacopo Tacchella, Sandro Johnson, Benjamin D. Baker, William M. Suess, Katherine A. Carniani, Stefano Ferruit, Pierre Arribas, Santiago Bonaventura, Nina Bunker, Andrew J. Cameron, Alex J. Charlot, Stephane Curti, Mirko de Graaff, Anna Maseda, Michael V. Rawle, Tim Rix, Hans-Walter Del Pino, Bruno Rodriguez Smit, Renske Übler, Hannah Willott, Chris Alberts, Stacey Egami, Eiichi Eisenstein, Daniel J. Endsley, Ryan Hausen, Ryan Rieke, Marcia Robertson, Brant Shivaei, Irene Williams, Christina C. Boyett, Kristan Chen, Zuyi Ji, Zhiyuan Jones, Gareth C. Kumari, Nimisha Nelson, Erica Perna, Michele Saxena, Aayush Scholtz, Jan |
| contents | Local and low-redshift ($z$<$3$) galaxies are known to broadly follow a bimodal distribution: actively star forming galaxies with relatively stable star-formation rates, and passive systems. These two populations are connected by galaxies in relatively slow transition. In contrast, theory predicts that star formation was stochastic at early cosmic times and in low-mass systems: these galaxies transitioned rapidly between starburst episodes and phases of suppressed star formation, potentially even causing temporary quiescence -- so-called mini-quenching events. However, the regime of star-formation burstiness is observationally highly unconstrained. Directly observing mini-quenched galaxies in the primordial Universe is therefore of utmost importance to constrain models of galaxy formation and transformation. Early quenched galaxies have been identified out to redshift $z<5$, and these are all found to be massive ($M_{*}>10^{10}~M_{\odot}$) and relatively old. Here we report a (mini-)quenched galaxy at z$=$7.3, when the Universe was only 700~Myr old. The JWST/NIRSpec spectrum is very blue ($U$-$V$$=$0.16$\pm0.03$~mag), but exhibits a Balmer break and no nebular emission lines. The galaxy experienced a short starburst followed by rapid quenching; its stellar mass (4-6$\times 10^8~M_\odot$) falls in a range that is sensitive to various feedback mechanisms, which can result in perhaps only temporary quenching. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2302_14155 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | A recently quenched galaxy 700 million years after the Big Bang Looser, Tobias J. D'Eugenio, Francesco Maiolino, Roberto Witstok, Joris Sandles, Lester Curtis-Lake, Emma Chevallard, Jacopo Tacchella, Sandro Johnson, Benjamin D. Baker, William M. Suess, Katherine A. Carniani, Stefano Ferruit, Pierre Arribas, Santiago Bonaventura, Nina Bunker, Andrew J. Cameron, Alex J. Charlot, Stephane Curti, Mirko de Graaff, Anna Maseda, Michael V. Rawle, Tim Rix, Hans-Walter Del Pino, Bruno Rodriguez Smit, Renske Übler, Hannah Willott, Chris Alberts, Stacey Egami, Eiichi Eisenstein, Daniel J. Endsley, Ryan Hausen, Ryan Rieke, Marcia Robertson, Brant Shivaei, Irene Williams, Christina C. Boyett, Kristan Chen, Zuyi Ji, Zhiyuan Jones, Gareth C. Kumari, Nimisha Nelson, Erica Perna, Michele Saxena, Aayush Scholtz, Jan Astrophysics of Galaxies Local and low-redshift ($z$<$3$) galaxies are known to broadly follow a bimodal distribution: actively star forming galaxies with relatively stable star-formation rates, and passive systems. These two populations are connected by galaxies in relatively slow transition. In contrast, theory predicts that star formation was stochastic at early cosmic times and in low-mass systems: these galaxies transitioned rapidly between starburst episodes and phases of suppressed star formation, potentially even causing temporary quiescence -- so-called mini-quenching events. However, the regime of star-formation burstiness is observationally highly unconstrained. Directly observing mini-quenched galaxies in the primordial Universe is therefore of utmost importance to constrain models of galaxy formation and transformation. Early quenched galaxies have been identified out to redshift $z<5$, and these are all found to be massive ($M_{*}>10^{10}~M_{\odot}$) and relatively old. Here we report a (mini-)quenched galaxy at z$=$7.3, when the Universe was only 700~Myr old. The JWST/NIRSpec spectrum is very blue ($U$-$V$$=$0.16$\pm0.03$~mag), but exhibits a Balmer break and no nebular emission lines. The galaxy experienced a short starburst followed by rapid quenching; its stellar mass (4-6$\times 10^8~M_\odot$) falls in a range that is sensitive to various feedback mechanisms, which can result in perhaps only temporary quenching. |
| title | A recently quenched galaxy 700 million years after the Big Bang |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2302.14155 |