Aungwerojwit, A. orcid.org/0000-0001-5686-5650, Gänsicke, B.T. orcid.org/0000-0002-2761-3005, Breedt, E. orcid.org/0000-0001-6180-3438 et al. (12 more authors) (2025) Follow-up on three poorly studied AM CVn stars. Monthly Notices of the Royal Astronomical Society, 537 (4). pp. 3078-3090. ISSN 0035-8711
Abstract
We report follow-up observations of three poorly studied AM CVn-type binaries: CRTS CSS150211 J091017 −200813, NSV 1440, and SDSS J183131.63 + 420220.2. Analysing time-series photometry obtained with a range of ground-based facilities as well as with the Transiting Exoplanet Survey Satellite ( TESS ), we determine the superhump period of CRTS J0910 −2008 as P sh = 29 . 700 ±0 . 004 min and the orbital period of NSV 1440 as P orb = 36 . 56 ± 0 . 03 min. We also confirm a photometric period of P = 23 . 026 ±0 . 097 min in SDSS J1831 + 4202, which is most likely the superhump period. We also report the first optical spectroscopy of CRTS J0910 −2008 and NSV 1440 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.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2025 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/ licenses/ by/ 4.0/ ), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
Keywords: | binaries: close; stars: dwarf novae; stars: individual: CRTS J091017.43−200812.3; NSV 1440; SDSS J183131.63+420220.2; novae, cataclysmic variables |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematical and Physical Sciences |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 27 Feb 2025 16:03 |
Last Modified: | 27 Feb 2025 16:03 |
Status: | Published |
Publisher: | Oxford University Press (OUP) |
Refereed: | Yes |
Identification Number: | 10.1093/mnras/staf173 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:223856 |