Follow-up on three poorly studied AM CVn stars
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| author | Aungwerojwit, Amornrat Gaensicke, Boris T. Breedt, E. Arjyotha, S. Hermes, J. J. Hambsch, F. -J. Kumar, A. Ramirez, S. H. Wilson, T. G. Dhillon, V. S. Marsh, T. R. Poshyachinda, S. Scaringi, S. Haislip, J. B. Reichart, D. E. |
| author_facet | Aungwerojwit, Amornrat Gaensicke, Boris T. Breedt, E. Arjyotha, S. Hermes, J. J. Hambsch, F. -J. Kumar, A. Ramirez, S. H. Wilson, T. G. Dhillon, V. S. Marsh, T. R. Poshyachinda, S. Scaringi, S. Haislip, J. B. Reichart, D. E. |
| contents | We report follow-up observations of three poorly studied AM CVn-type binaries: CRTS CSS150211 J091017-200813, NSV1440, and SDSSJ183131.63+420220.2. Analysing time-series photometry obtained with a range of ground-based facilities as well as with TESS, we determine the superhump period of CRTSJ0910-2008 as P_sh=29.700+-0.004min and the orbital period of NSV1440 as Porb=36.56+-0.03min. We also confirm a photometric period of P=23.026+-0.097min in SDSSJ1831+4202, which is most likely the superhump period. We also report the first optical spectroscopy of CRTSJ0910-2008 and NSV1440 which unambiguously confirms both as AM CVn systems. We briefly discuss the distribution in the Hertzsprung-Russell diagram of the currently known sample of 63 AM CVn stars with known periods and Gaia data. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2501_16424 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Follow-up on three poorly studied AM CVn stars Aungwerojwit, Amornrat Gaensicke, Boris T. Breedt, E. Arjyotha, S. Hermes, J. J. Hambsch, F. -J. Kumar, A. Ramirez, S. H. Wilson, T. G. Dhillon, V. S. Marsh, T. R. Poshyachinda, S. Scaringi, S. Haislip, J. B. Reichart, D. E. Solar and Stellar Astrophysics We report follow-up observations of three poorly studied AM CVn-type binaries: CRTS CSS150211 J091017-200813, NSV1440, and SDSSJ183131.63+420220.2. Analysing time-series photometry obtained with a range of ground-based facilities as well as with TESS, we determine the superhump period of CRTSJ0910-2008 as P_sh=29.700+-0.004min and the orbital period of NSV1440 as Porb=36.56+-0.03min. We also confirm a photometric period of P=23.026+-0.097min in SDSSJ1831+4202, which is most likely the superhump period. We also report the first optical spectroscopy of CRTSJ0910-2008 and NSV1440 which unambiguously confirms both as AM CVn systems. We briefly discuss the distribution in the Hertzsprung-Russell diagram of the currently known sample of 63 AM CVn stars with known periods and Gaia data. |
| title | Follow-up on three poorly studied AM CVn stars |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2501.16424 |