Watson, C.A., Dhillon, V.S. orcid.org/0000-0003-4236-9642, Rutten, R.G.M. et al. (1 more author) (2003) Roche tomography of cataclysmic variables - II. Images of the secondary stars in AM Her, QQ Vul, IP Peg and HU Aqr. Monthly Notices of the Royal Astronomical Society, 341 (1). pp. 129-142. ISSN 0035-8711
Abstract
We present a set of Roche tomography reconstructions of the secondary stars in the cataclysmic variables AM Her, QQ Vul, IP Peg and HU Aqr. The image reconstructions show distinct asymmetries in the irradiation pattern for all four systems that can be attributed to shielding of the secondary star by the accretion stream/column in AM Her, QQ Vul and HU Aqr, and increased irradiation by the bright-spot in IP Peg. We use the entropy landscape technique to derive accurate system parameters (M1, M2, i and γ) for the four binaries. In principle, this technique should provide the most reliable mass determinations available, since the intensity distribution across the secondary star is known. We also find that the intensity distribution can systematically affect the value of γ derived from circular orbit fits to radial velocity variations.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2003 RAS. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | line : profiles; binaries : close; stars : imaging; stars : late-type; novae, cataclysmic variables |
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) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 27 Oct 2017 14:18 |
Last Modified: | 27 Oct 2017 14:24 |
Published Version: | https://doi.org/10.1046/j.1365-8711.2003.06381.x |
Status: | Published |
Publisher: | Wiley |
Refereed: | Yes |
Identification Number: | 10.1046/j.1365-8711.2003.06381.x |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:122737 |