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| Hauptverfasser: | , , , , , , , , |
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| Format: | Preprint |
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2025
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| Online-Zugang: | https://arxiv.org/abs/2502.18098 |
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| _version_ | 1866918067169132544 |
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| author | Gessey-Jones, T. Sartorio, N. S. Bevins, H. T. J. Fialkov, A. Handley, W. J. Acedo, E. de Lera Mirouh, G. M. Izzard, R. G. Barkana, R. |
| author_facet | Gessey-Jones, T. Sartorio, N. S. Bevins, H. T. J. Fialkov, A. Handley, W. J. Acedo, E. de Lera Mirouh, G. M. Izzard, R. G. Barkana, R. |
| contents | The formation of the first stars and the subsequent population of X-ray binaries represents a fundamental transition in the state of the Universe as it evolves from near homogeneity to being abundant in collapsed structures such as galaxies. Due to a lack of direct observations, the properties of these stars remain highly uncertain. By considering the impact of the first stars and their remnant X-ray binaries on the cosmological 21-cm signal, we demonstrate that upcoming observations have the potential to significantly improve our understanding of these objects. We find a 25 mK sensitivity measurement of the 21-cm global signal by a wide-beam radiometer, such as REACH, or 3,000 hours of foreground avoidance observations of the 21-cm power spectrum by SKA-Low, could provide three-sigma constraints on the mass distribution of the first stars. Such measurements will fill a critical gap in our understanding of the early Universe and aid in interpreting high-redshift galaxy observations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_18098 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The mass distribution of the first stars can be determined via the 21-cm signal Gessey-Jones, T. Sartorio, N. S. Bevins, H. T. J. Fialkov, A. Handley, W. J. Acedo, E. de Lera Mirouh, G. M. Izzard, R. G. Barkana, R. Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies The formation of the first stars and the subsequent population of X-ray binaries represents a fundamental transition in the state of the Universe as it evolves from near homogeneity to being abundant in collapsed structures such as galaxies. Due to a lack of direct observations, the properties of these stars remain highly uncertain. By considering the impact of the first stars and their remnant X-ray binaries on the cosmological 21-cm signal, we demonstrate that upcoming observations have the potential to significantly improve our understanding of these objects. We find a 25 mK sensitivity measurement of the 21-cm global signal by a wide-beam radiometer, such as REACH, or 3,000 hours of foreground avoidance observations of the 21-cm power spectrum by SKA-Low, could provide three-sigma constraints on the mass distribution of the first stars. Such measurements will fill a critical gap in our understanding of the early Universe and aid in interpreting high-redshift galaxy observations. |
| title | The mass distribution of the first stars can be determined via the 21-cm signal |
| topic | Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2502.18098 |