LAMOST J1010+2358 is not a Pair-Instability Supernova Relic
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866913462815293440 |
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| author | Thibodeaux, Pierre N. Ji, Alexander P. Cerny, William Kirby, Evan N. Simon, Joshua D. |
| author_facet | Thibodeaux, Pierre N. Ji, Alexander P. Cerny, William Kirby, Evan N. Simon, Joshua D. |
| contents | The discovery of a star formed out of pair-instability supernova ejecta would have massive implications for the Population III star initial mass function and the existence of stars over 100 Msun, but none have yet been found. Recently, the star LAMOST J1010+2358 was claimed to be a star that formed out of gas enriched by a pair-instability supernova. We present a non-LTE abundance analysis of a new high-resolution Keck/HIRES spectrum of J1010+2358. We determined the carbon and aluminum abundances needed to definitively distinguish between enrichment by a pair-instability and core-collapse supernova. Our new analysis demonstrates that J1010+2358 does not have the unique abundance pattern of a a pair-instability supernova, but was instead enriched by the ejecta of a low mass core-collapse supernova. Thus, there are still no known stars displaying unambiguous signatures of pair-instability supernovae. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_17078 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | LAMOST J1010+2358 is not a Pair-Instability Supernova Relic Thibodeaux, Pierre N. Ji, Alexander P. Cerny, William Kirby, Evan N. Simon, Joshua D. Solar and Stellar Astrophysics Astrophysics of Galaxies High Energy Astrophysical Phenomena The discovery of a star formed out of pair-instability supernova ejecta would have massive implications for the Population III star initial mass function and the existence of stars over 100 Msun, but none have yet been found. Recently, the star LAMOST J1010+2358 was claimed to be a star that formed out of gas enriched by a pair-instability supernova. We present a non-LTE abundance analysis of a new high-resolution Keck/HIRES spectrum of J1010+2358. We determined the carbon and aluminum abundances needed to definitively distinguish between enrichment by a pair-instability and core-collapse supernova. Our new analysis demonstrates that J1010+2358 does not have the unique abundance pattern of a a pair-instability supernova, but was instead enriched by the ejecta of a low mass core-collapse supernova. Thus, there are still no known stars displaying unambiguous signatures of pair-instability supernovae. |
| title | LAMOST J1010+2358 is not a Pair-Instability Supernova Relic |
| topic | Solar and Stellar Astrophysics Astrophysics of Galaxies High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2404.17078 |