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The cataclysmic variable period gap: still there

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journal contribution
posted on 23.10.2019, 15:56 by U. Kolb, A. R. King, H. Ritter
We consider a recently-proposed alternative explanation of the CV period gap in terms of a revised mass-radius relation for the lower main sequence. We show that no such thermal-equilibrium relation is likely to produce a true gap. Using population synthesis techniques we calculate a model population that obeys the claimed equilibrium mass-radius relation. A theoretical period histogram obtained from this population shows two prominent period spikes rather than a gap. We consider also recent arguments suggesting that the period gap itself may not be real. We argue that, far from demonstrating a weakness of the interrupted-braking picture, the fact that most CV subtypes prefer one side of the gap or the other is actually an expected consequence of it.

Funding

ARK thanks the U.K. Particle Physics and Astronomy Research Council for a Senior Fellowship. Theoretical astrophysics research at Leicester is supported by a PPARC Rolling Grant.

History

Citation

Monthly Notices of the Royal Astronomical Society, 1998, 298 (2), pp. L29-L33

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy

Version

AM (Accepted Manuscript)

Published in

Monthly Notices of the Royal Astronomical Society

Publisher

Oxford University Press (OUP), Royal Astronomical Society

issn

1365-2966

Acceptance date

15/05/1998

Copyright date

1998

Available date

23/10/2019

Publisher version

https://academic.oup.com/mnras/article/298/2/L29/1056640

Language

en