H.E.S.S. observations of SN 2024ggi
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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_ | 1866909823132499968 |
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| author | Borowska-Naguszewska, Jowita Brose, Robert Cornejo, Bernardo Mackey, Jonathan Parsons, Robert Daniel Schüssler, Fabian |
| author_facet | Borowska-Naguszewska, Jowita Brose, Robert Cornejo, Bernardo Mackey, Jonathan Parsons, Robert Daniel Schüssler, Fabian |
| contents | Supernova (SN) explosions interacting with dense circumstellar medium are considered to be very promising sites for efficient cosmic-ray (CR) acceleration and subsequent emission of neutral-pion-decay gamma rays. These environments share similarities with already detected gamma-ray novae, but with much greater available energy content, so it is important to characterize their emission in the very-high-energy range. We present the results of H.E.S.S. observations of one such candidate source - SN 2024ggi, located in NGC 3621 at a distance of 7.24 Mpc. A total of 30 hours of data, gathered throughout a month of post-explosion observations, provide flux upper limits that are used to constrain source parameters, offering meaningful insights for theoretical predictions. We exclude bright gamma-ray emission in the first day after explosion, and later upper limits are consistent with wind densities derived from optical observations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_02796 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | H.E.S.S. observations of SN 2024ggi Borowska-Naguszewska, Jowita Brose, Robert Cornejo, Bernardo Mackey, Jonathan Parsons, Robert Daniel Schüssler, Fabian High Energy Astrophysical Phenomena Supernova (SN) explosions interacting with dense circumstellar medium are considered to be very promising sites for efficient cosmic-ray (CR) acceleration and subsequent emission of neutral-pion-decay gamma rays. These environments share similarities with already detected gamma-ray novae, but with much greater available energy content, so it is important to characterize their emission in the very-high-energy range. We present the results of H.E.S.S. observations of one such candidate source - SN 2024ggi, located in NGC 3621 at a distance of 7.24 Mpc. A total of 30 hours of data, gathered throughout a month of post-explosion observations, provide flux upper limits that are used to constrain source parameters, offering meaningful insights for theoretical predictions. We exclude bright gamma-ray emission in the first day after explosion, and later upper limits are consistent with wind densities derived from optical observations. |
| title | H.E.S.S. observations of SN 2024ggi |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2510.02796 |