Cosmic-Ray Bath in a Past Supernova Gives Birth to Earth-Like Planets
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912756877230080 |
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| author | Sawada, Ryo Kurokawa, Hiroyuki Suwa, Yudai Taki, Tetsuo Lee, Shiu-Hang Tanikawa, Ataru |
| author_facet | Sawada, Ryo Kurokawa, Hiroyuki Suwa, Yudai Taki, Tetsuo Lee, Shiu-Hang Tanikawa, Ataru |
| contents | A key question in astronomy is how ubiquitous Earth-like rocky planets are. The formation of terrestrial planets in our solar system was strongly influenced by the radioactive decay heat of short-lived radionuclides (SLRs), particularly $^{26}$Al, likely delivered from nearby supernovae. However, current models struggle to reproduce the abundance of SLRs inferred from meteorite analysis without destroying the protosolar disk. We propose the `immersion' mechanism, where cosmic-ray nucleosynthesis in a supernova shockwave reproduces estimated SLR abundances at a supernova distance ($\sim$1 pc), preserving the disk. We estimate that solar-mass stars in star clusters typically experience at least one such supernova within 1 pc, supporting the feasibility of this scenario. This suggests solar-system-like SLR abundances and terrestrial planet formation are more common than previously thought. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_09660 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Cosmic-Ray Bath in a Past Supernova Gives Birth to Earth-Like Planets Sawada, Ryo Kurokawa, Hiroyuki Suwa, Yudai Taki, Tetsuo Lee, Shiu-Hang Tanikawa, Ataru Earth and Planetary Astrophysics Astrophysics of Galaxies High Energy Astrophysical Phenomena Solar and Stellar Astrophysics A key question in astronomy is how ubiquitous Earth-like rocky planets are. The formation of terrestrial planets in our solar system was strongly influenced by the radioactive decay heat of short-lived radionuclides (SLRs), particularly $^{26}$Al, likely delivered from nearby supernovae. However, current models struggle to reproduce the abundance of SLRs inferred from meteorite analysis without destroying the protosolar disk. We propose the `immersion' mechanism, where cosmic-ray nucleosynthesis in a supernova shockwave reproduces estimated SLR abundances at a supernova distance ($\sim$1 pc), preserving the disk. We estimate that solar-mass stars in star clusters typically experience at least one such supernova within 1 pc, supporting the feasibility of this scenario. This suggests solar-system-like SLR abundances and terrestrial planet formation are more common than previously thought. |
| title | Cosmic-Ray Bath in a Past Supernova Gives Birth to Earth-Like Planets |
| topic | Earth and Planetary Astrophysics Astrophysics of Galaxies High Energy Astrophysical Phenomena Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2512.09660 |