A COLIBRI Photometric Study of SN 2025bvm: A Normal, Slowly Declining Type Ia Supernova
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| author | Gonzalez-Buitrago, Diego Hernando Garcia-Diaz, Maria Teresa Montoya-Olivo, Alberto Emiliano Sanchez-Sanjuan, Sergio Avila-Mogollon, Hector |
| author_facet | Gonzalez-Buitrago, Diego Hernando Garcia-Diaz, Maria Teresa Montoya-Olivo, Alberto Emiliano Sanchez-Sanjuan, Sergio Avila-Mogollon, Hector |
| contents | We present 121 days of multi-band (\Bband, \gband, \rband, \iband) optical photometry of the Type Ia supernova SN 2025bvm, obtained with the COLIBRI telescope at OAN-SPM. The light curves show a photometric decline of $Δm_{15}(B) = 0.867 \pm 0.051$~mag, characteristic of a slow-declining Type Ia supernova. After correcting for host galaxy extinction ($E(B-V)_{host} = 0.308 \pm 0.030$~mag) and adopting a distance of 70~Mpc, we derive a peak absolute magnitude of $M_B = -19.13 \pm 0.40$~mag. This luminosity is fully consistent with its slow decline rate, placing SN 2025bvm within the population of normal Type Ia supernovae. We conclude that SN 2025bvm is a normal Type Ia supernova, whose photometric properties, such as a slow late-time decline and a prominent \iband-band secondary maximum, suggest an explosion that resulted in a particularly massive ejecta. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_07745 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | A COLIBRI Photometric Study of SN 2025bvm: A Normal, Slowly Declining Type Ia Supernova Gonzalez-Buitrago, Diego Hernando Garcia-Diaz, Maria Teresa Montoya-Olivo, Alberto Emiliano Sanchez-Sanjuan, Sergio Avila-Mogollon, Hector High Energy Astrophysical Phenomena We present 121 days of multi-band (\Bband, \gband, \rband, \iband) optical photometry of the Type Ia supernova SN 2025bvm, obtained with the COLIBRI telescope at OAN-SPM. The light curves show a photometric decline of $Δm_{15}(B) = 0.867 \pm 0.051$~mag, characteristic of a slow-declining Type Ia supernova. After correcting for host galaxy extinction ($E(B-V)_{host} = 0.308 \pm 0.030$~mag) and adopting a distance of 70~Mpc, we derive a peak absolute magnitude of $M_B = -19.13 \pm 0.40$~mag. This luminosity is fully consistent with its slow decline rate, placing SN 2025bvm within the population of normal Type Ia supernovae. We conclude that SN 2025bvm is a normal Type Ia supernova, whose photometric properties, such as a slow late-time decline and a prominent \iband-band secondary maximum, suggest an explosion that resulted in a particularly massive ejecta. |
| title | A COLIBRI Photometric Study of SN 2025bvm: A Normal, Slowly Declining Type Ia Supernova |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2601.07745 |