Mass of Cepheid V350 Sgr Incorporating Interferometry and the Companion Mass
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arXiv
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| Autores principales: | , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866913847898537984 |
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| author | Evans, Nancy Remage Gallenne, Alexandre Kervella, Pierre Guenther, H. Moritz Kuraszkiewicz, Joanna Anderson, Richard I. Proffitt, Charles Merand, Antoine Trahin, Boris Viviani, Giordano Shetye, Shreeya |
| author_facet | Evans, Nancy Remage Gallenne, Alexandre Kervella, Pierre Guenther, H. Moritz Kuraszkiewicz, Joanna Anderson, Richard I. Proffitt, Charles Merand, Antoine Trahin, Boris Viviani, Giordano Shetye, Shreeya |
| contents | The system V350 Sgr has a classical Cepheid for the primary. Interferometry is presented for the system and the full orbit is determined. The mass of the companion has been determined from an {\it IUE} spectrum and comparison with the mass-temperature relation from Detached Eclipsing Binaries. Combined with the mass of the companion (2.6 $\pm$ 0.2 M$_\odot$), the mass of the Cepheid is determined to be 4.7 $\pm$ 0.8 M$_\odot$. For systems with less complete information, Cepheid masses can be determined from a single-lined spectroscopic orbit, {\it Gaia} proper motion anomalies, and the mass of the companion from the ultraviolet. Uncertainties resulting from different approaches to mass determination are discussed, and are expected to be reduced after the {\it Gaia} DR4 release. Temperatures for Morgan Keenan (MK) standard stars from the ultraviolet are also provided. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_13627 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Mass of Cepheid V350 Sgr Incorporating Interferometry and the Companion Mass Evans, Nancy Remage Gallenne, Alexandre Kervella, Pierre Guenther, H. Moritz Kuraszkiewicz, Joanna Anderson, Richard I. Proffitt, Charles Merand, Antoine Trahin, Boris Viviani, Giordano Shetye, Shreeya Solar and Stellar Astrophysics Astrophysics of Galaxies The system V350 Sgr has a classical Cepheid for the primary. Interferometry is presented for the system and the full orbit is determined. The mass of the companion has been determined from an {\it IUE} spectrum and comparison with the mass-temperature relation from Detached Eclipsing Binaries. Combined with the mass of the companion (2.6 $\pm$ 0.2 M$_\odot$), the mass of the Cepheid is determined to be 4.7 $\pm$ 0.8 M$_\odot$. For systems with less complete information, Cepheid masses can be determined from a single-lined spectroscopic orbit, {\it Gaia} proper motion anomalies, and the mass of the companion from the ultraviolet. Uncertainties resulting from different approaches to mass determination are discussed, and are expected to be reduced after the {\it Gaia} DR4 release. Temperatures for Morgan Keenan (MK) standard stars from the ultraviolet are also provided. |
| title | Mass of Cepheid V350 Sgr Incorporating Interferometry and the Companion Mass |
| topic | Solar and Stellar Astrophysics Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2505.13627 |