The HST Ultraviolet Spectrum of V723 Mon: Additional Evidence of a Stellar Companion
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866916948749582336 |
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| author | Kochanek, C. S. Stanek, K. Z. Thompson, T. A. Jayasinghe, T. |
| author_facet | Kochanek, C. S. Stanek, K. Z. Thompson, T. A. Jayasinghe, T. |
| contents | V723 Mon is a high mass function (f=1.7Msun) single lined spectroscopic binary with a red giant primary that Jayasinghe et al. (2021) suggested had a black hole as its massive companion. Unfortunately, el-Badry et al. (2022) demonstrated that it had a hotter stellar companion whose detectability in optical spectra was difficult due to its rapid rotation. Here we confirm the presence of the stellar companion with a Hubble Space Telescope STIS ultraviolet spectrum. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2509_10608 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The HST Ultraviolet Spectrum of V723 Mon: Additional Evidence of a Stellar Companion Kochanek, C. S. Stanek, K. Z. Thompson, T. A. Jayasinghe, T. Solar and Stellar Astrophysics High Energy Astrophysical Phenomena V723 Mon is a high mass function (f=1.7Msun) single lined spectroscopic binary with a red giant primary that Jayasinghe et al. (2021) suggested had a black hole as its massive companion. Unfortunately, el-Badry et al. (2022) demonstrated that it had a hotter stellar companion whose detectability in optical spectra was difficult due to its rapid rotation. Here we confirm the presence of the stellar companion with a Hubble Space Telescope STIS ultraviolet spectrum. |
| title | The HST Ultraviolet Spectrum of V723 Mon: Additional Evidence of a Stellar Companion |
| topic | Solar and Stellar Astrophysics High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2509.10608 |