Littlefair, S.P. orcid.org/0000-0001-7221-855X, Rodríguez-Gil, P. orcid.org/0000-0002-4717-5102, Marsh, T.R. orcid.org/0000-0002-2498-7589 et al. (2 more authors) (2024) The donor star radial velocity curve in the cataclysmic variable GY Cnc confirms white dwarf eclipse modelling mass. Monthly Notices of the Royal Astronomical Society, 527 (2). pp. 4353-4358. ISSN 0035-8711
Abstract
A large number of white dwarf and donor masses in cataclysmic variables have been found via modelling the primary eclipse, a method that relies on untested assumptions. Recent measurements of the mass of the white dwarf in the cataclysmic variable GY Cnc, obtained via modelling its ultraviolet spectrum, conflict with the mass obtained via modelling the eclipse light curve. Here we measure the radial velocity of the absorption lines from the donor star in GY Cnc to be Kabs = 280 ± 2 km s−1, in excellent agreement with the prediction based on the masses derived from modelling the eclipse light curve. It is possible that the white dwarf mass derived from the ultraviolet spectrum of GY Cnc is affected by the difficulty of disentangling the white dwarf spectrum from the accretion disc spectrum.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author(s) 2023. 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: eclipsing; stars: dwarf novae; stars: evolution; novae, cataclysmic variables; white dwarfs. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Funding Information: | Funder Grant number SCIENCE AND TECHNOLOGY FACILITIES COUNCIL ST/V000853/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 19 Jan 2024 12:05 |
Last Modified: | 19 Jan 2024 12:05 |
Status: | Published |
Publisher: | Oxford University Press (OUP) |
Refereed: | Yes |
Identification Number: | 10.1093/mnras/stad3500 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:207697 |