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High-speed photometry of the eclipsing dwarf nova OY CarinaeHigh-speed photometry of the eclipsing dwarf nova OY Car in the quiescent state is presented. OY Car becomes highly reddened during eclipse, with minimum flux colours inconsistent with optically thick emission in the U and B bandpasses. Mass ratios in the range 6.5 to 12 are required to reconcile the eclipse structure with theoretical gas stream trajectories. Primary eclipse timings reveal a significant decrease in the orbital period and the duration of primary eclipse indicates the presence of a luminous ring about the white dwarf. The hotspot eclipse reveals a hotspot which is elongated along the rim of the accretion disc, with optical emission being non-uniformly distributed along the rim. The location of the hotspot in the accretion disc implies a disc radius larger than that of an inviscid disc, with variation in the position of the hotspot being consistent with a fixed stream trajectory.
Document ID
19850061299
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Cook, M. C.
(Leicester, University United Kingdom)
Date Acquired
August 12, 2013
Publication Date
July 15, 1985
Publication Information
Publication: Royal Astronomical Society, Monthly Notices
Volume: 215
ISSN: 0035-8711
Subject Category
Astrophysics
Accession Number
85A43450
Funding Number(s)
CONTRACT_GRANT: NSG-7653
CONTRACT_GRANT: NSF PHY-80-25605
Distribution Limits
Public
Copyright
Other

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