A core in a star-forming disc as evidence of inside-out growth in the early Universe
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arXiv
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| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866910599492927488 |
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| author | Baker, William M. Tacchella, Sandro Johnson, Benjamin D. Nelson, Erica Suess, Katherine A. D'Eugenio, Francesco Curti, Mirko de Graaff, Anna Ji, Zhiyuan Maiolino, Roberto Robertson, Brant Scholtz, Jan Alberts, Stacey Arribas, Santiago Boyett, Kristan Bunker, Andrew J. Carniani, Stefano Charlot, Stephane Chen, Zuyi Chevallard, Jacopo Curtis-Lake, Emma Danhaive, A. Lola DeCoursey, Christa Egami, Eiichi Eisenstein, Daniel J. Endsley, Ryan Hausen, Ryan Helton, Jakob M. Kumari, Nimisha Looser, Tobias J. Maseda, Michael V. Puskás, Dávid Rieke, Marcia Sandles, Lester Sun, Fengwu Übler, Hannah Williams, Christina C. Willmer, Christopher N. A. Witstok, Joris |
| author_facet | Baker, William M. Tacchella, Sandro Johnson, Benjamin D. Nelson, Erica Suess, Katherine A. D'Eugenio, Francesco Curti, Mirko de Graaff, Anna Ji, Zhiyuan Maiolino, Roberto Robertson, Brant Scholtz, Jan Alberts, Stacey Arribas, Santiago Boyett, Kristan Bunker, Andrew J. Carniani, Stefano Charlot, Stephane Chen, Zuyi Chevallard, Jacopo Curtis-Lake, Emma Danhaive, A. Lola DeCoursey, Christa Egami, Eiichi Eisenstein, Daniel J. Endsley, Ryan Hausen, Ryan Helton, Jakob M. Kumari, Nimisha Looser, Tobias J. Maseda, Michael V. Puskás, Dávid Rieke, Marcia Sandles, Lester Sun, Fengwu Übler, Hannah Williams, Christina C. Willmer, Christopher N. A. Witstok, Joris |
| contents | The physical processes that establish the morphological evolution and the structural diversity of galaxies are key unknowns in extragalactic astrophysics. Here we report the finding of the morphologically-mature galaxy JADES-GS+53.18343-27.79097, which existed within the first 700 million years of the Universe's history. This star-forming galaxy with a stellar mass of 400 million solar masses consists of three components, a highly-compact core with a half-light radius of less than 100 pc, an actively star-forming disc with a radius of about 400 pc, and a star-forming clump, which all show distinctive star-formation histories. The central stellar mass density of this galaxy is within a factor of two of the most massive present-day ellipticals, while being globally 1000 times less massive. The radial profile of the specific star-formation rate is rising toward the outskirts. This evidence suggests the first detection of inside-out growth of a galaxy as a proto-bulge and a star-forming disc in the Epoch of Reionization. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2306_02472 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | A core in a star-forming disc as evidence of inside-out growth in the early Universe Baker, William M. Tacchella, Sandro Johnson, Benjamin D. Nelson, Erica Suess, Katherine A. D'Eugenio, Francesco Curti, Mirko de Graaff, Anna Ji, Zhiyuan Maiolino, Roberto Robertson, Brant Scholtz, Jan Alberts, Stacey Arribas, Santiago Boyett, Kristan Bunker, Andrew J. Carniani, Stefano Charlot, Stephane Chen, Zuyi Chevallard, Jacopo Curtis-Lake, Emma Danhaive, A. Lola DeCoursey, Christa Egami, Eiichi Eisenstein, Daniel J. Endsley, Ryan Hausen, Ryan Helton, Jakob M. Kumari, Nimisha Looser, Tobias J. Maseda, Michael V. Puskás, Dávid Rieke, Marcia Sandles, Lester Sun, Fengwu Übler, Hannah Williams, Christina C. Willmer, Christopher N. A. Witstok, Joris Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics The physical processes that establish the morphological evolution and the structural diversity of galaxies are key unknowns in extragalactic astrophysics. Here we report the finding of the morphologically-mature galaxy JADES-GS+53.18343-27.79097, which existed within the first 700 million years of the Universe's history. This star-forming galaxy with a stellar mass of 400 million solar masses consists of three components, a highly-compact core with a half-light radius of less than 100 pc, an actively star-forming disc with a radius of about 400 pc, and a star-forming clump, which all show distinctive star-formation histories. The central stellar mass density of this galaxy is within a factor of two of the most massive present-day ellipticals, while being globally 1000 times less massive. The radial profile of the specific star-formation rate is rising toward the outskirts. This evidence suggests the first detection of inside-out growth of a galaxy as a proto-bulge and a star-forming disc in the Epoch of Reionization. |
| title | A core in a star-forming disc as evidence of inside-out growth in the early Universe |
| topic | Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2306.02472 |