Infrared Spectroscopy of V838 Monocerotis in 2015 and 2022
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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_ | 1866912503824384000 |
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| author | Geballe, T. R. Kaminskiy, B. M. Banerjee, D. P. K. Evans, A. Pavlenko, Y. Rushton, M. T. Popescu, M. Eyres, S. P. S. |
| author_facet | Geballe, T. R. Kaminskiy, B. M. Banerjee, D. P. K. Evans, A. Pavlenko, Y. Rushton, M. T. Popescu, M. Eyres, S. P. S. |
| contents | We report medium-resolution $0.85-2.45\,μ$m spectroscopy obtained in 2015 and 2022 and high resolution $2.27-2.39\,μ$m and $4.59-4.77\,μ$m spectroscopy obtained in 2015 of V838 Monocerotis, along with modeling of the $0.85-2.45\,μ$ spectrum. V838 Mon underwent a series of eruptions and extreme brightenings in 2002, which are thought to have occured as a result of a stellar merger. The new spectra and modelling of them reveal a disturbed red giant photosphere that is probably continuing to contract and ejecta that are cooling and continuing to disperse at velocities up to 200kms$^{-1}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_13151 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Infrared Spectroscopy of V838 Monocerotis in 2015 and 2022 Geballe, T. R. Kaminskiy, B. M. Banerjee, D. P. K. Evans, A. Pavlenko, Y. Rushton, M. T. Popescu, M. Eyres, S. P. S. Solar and Stellar Astrophysics We report medium-resolution $0.85-2.45\,μ$m spectroscopy obtained in 2015 and 2022 and high resolution $2.27-2.39\,μ$m and $4.59-4.77\,μ$m spectroscopy obtained in 2015 of V838 Monocerotis, along with modeling of the $0.85-2.45\,μ$ spectrum. V838 Mon underwent a series of eruptions and extreme brightenings in 2002, which are thought to have occured as a result of a stellar merger. The new spectra and modelling of them reveal a disturbed red giant photosphere that is probably continuing to contract and ejecta that are cooling and continuing to disperse at velocities up to 200kms$^{-1}$. |
| title | Infrared Spectroscopy of V838 Monocerotis in 2015 and 2022 |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2507.13151 |