Discovery of a variable yellow supergiant progenitor for the Type IIb SN 2024abfo
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866908415527223296 |
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| author | Niu, Zexi Sun, Ning-Chen Maund, Justyn R. Guo, Zhen Li, Wenxiong Sun, Meng Liu, Jifeng |
| author_facet | Niu, Zexi Sun, Ning-Chen Maund, Justyn R. Guo, Zhen Li, Wenxiong Sun, Meng Liu, Jifeng |
| contents | We report the discovery of a progenitor candidate for the Type~IIb SN2024abfo using multi-epoch pre-explosion images from the Hubble Space Telescope and the Dark Energy Camera Legacy Survey. The progenitor exhibited a ~0.7 mag decline in F814W from 2001 to 2013, followed by significant brightening and color fluctuations in the g, r and z bands. This is the first time that substantial photometric variability has been found for the progenitor of a SN IIb. We suggest that the variability is caused by intrinsic changes in the progenitor star instead of varying obscuration by circumstellar dust. Our results show that the progenitor of SN2024abfo was likely a yellow supergiant star with an initial mass of 12--18 Msun for circumstellar reddening of E(B-V)_CSM < 0.2 mag. Our study underscores the critical role of multi-epoch imaging surveys in revealing the final stages of core-collapse supernovae progenitors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_20407 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Discovery of a variable yellow supergiant progenitor for the Type IIb SN 2024abfo Niu, Zexi Sun, Ning-Chen Maund, Justyn R. Guo, Zhen Li, Wenxiong Sun, Meng Liu, Jifeng High Energy Astrophysical Phenomena Astrophysics of Galaxies Solar and Stellar Astrophysics We report the discovery of a progenitor candidate for the Type~IIb SN2024abfo using multi-epoch pre-explosion images from the Hubble Space Telescope and the Dark Energy Camera Legacy Survey. The progenitor exhibited a ~0.7 mag decline in F814W from 2001 to 2013, followed by significant brightening and color fluctuations in the g, r and z bands. This is the first time that substantial photometric variability has been found for the progenitor of a SN IIb. We suggest that the variability is caused by intrinsic changes in the progenitor star instead of varying obscuration by circumstellar dust. Our results show that the progenitor of SN2024abfo was likely a yellow supergiant star with an initial mass of 12--18 Msun for circumstellar reddening of E(B-V)_CSM < 0.2 mag. Our study underscores the critical role of multi-epoch imaging surveys in revealing the final stages of core-collapse supernovae progenitors. |
| title | Discovery of a variable yellow supergiant progenitor for the Type IIb SN 2024abfo |
| topic | High Energy Astrophysical Phenomena Astrophysics of Galaxies Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2504.20407 |