The Orbit and Mass of the Cepheid AW Per
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| Main Authors: | , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909231606661120 |
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| author | Evans, Nancy Remage Gallenne, Alexandre Kervella, Pierre Mérand, Antoine Monnier, John Anderson, Richard I Günther, H. Moritz Proffitt, Charles Winston, Elaine M. Pietrzynski, Grzegorz Gieren, Wolfgang Kuraszkiewicz, Joanna Anugu, Narsireddy Roettenbacher, Rachael M. Lanthermann, Cyprien Gutierrez, Mayra Schaefer, Gail Setterholm, Benjamin R. Ibrahim, Noura Kraus, Stefan |
| author_facet | Evans, Nancy Remage Gallenne, Alexandre Kervella, Pierre Mérand, Antoine Monnier, John Anderson, Richard I Günther, H. Moritz Proffitt, Charles Winston, Elaine M. Pietrzynski, Grzegorz Gieren, Wolfgang Kuraszkiewicz, Joanna Anugu, Narsireddy Roettenbacher, Rachael M. Lanthermann, Cyprien Gutierrez, Mayra Schaefer, Gail Setterholm, Benjamin R. Ibrahim, Noura Kraus, Stefan |
| contents | The Cepheid AW Per is a component in a multiple system with a long period orbit. The radial velocities of Griffin (2016) cover the 38 year orbit well. An extensive program of interferometry with the CHARA array is reported here, from which the long period orbit is determined. In addition, a {\it Hubble Space Telescope} high resolution spectrum in the ultraviolet demonstrates that the companion is itself a binary with nearly equal mass components. These data combined with a distance from {\it Gaia} provide a mass of the Cepheid (primary) of M$_1$ = 6.79 $\pm$ 0.85 $M_\odot$. The combined mass of the secondary is M$_S$ = 8.79 $\pm$ 0.50 $M_\odot$. The accuracy of the mass will be improved after the fourth Gaia data release expected in approximately two years. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2406_17881 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The Orbit and Mass of the Cepheid AW Per Evans, Nancy Remage Gallenne, Alexandre Kervella, Pierre Mérand, Antoine Monnier, John Anderson, Richard I Günther, H. Moritz Proffitt, Charles Winston, Elaine M. Pietrzynski, Grzegorz Gieren, Wolfgang Kuraszkiewicz, Joanna Anugu, Narsireddy Roettenbacher, Rachael M. Lanthermann, Cyprien Gutierrez, Mayra Schaefer, Gail Setterholm, Benjamin R. Ibrahim, Noura Kraus, Stefan Solar and Stellar Astrophysics The Cepheid AW Per is a component in a multiple system with a long period orbit. The radial velocities of Griffin (2016) cover the 38 year orbit well. An extensive program of interferometry with the CHARA array is reported here, from which the long period orbit is determined. In addition, a {\it Hubble Space Telescope} high resolution spectrum in the ultraviolet demonstrates that the companion is itself a binary with nearly equal mass components. These data combined with a distance from {\it Gaia} provide a mass of the Cepheid (primary) of M$_1$ = 6.79 $\pm$ 0.85 $M_\odot$. The combined mass of the secondary is M$_S$ = 8.79 $\pm$ 0.50 $M_\odot$. The accuracy of the mass will be improved after the fourth Gaia data release expected in approximately two years. |
| title | The Orbit and Mass of the Cepheid AW Per |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2406.17881 |