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Resumption of mass accretion in RS Oph

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journal contribution
posted on 24.10.2012, 09:06 by H. L. Worters, S. P. S. Eyres, G. E. Bromage, J. P. Osborne
The latest outburst of the recurrent nova RS Oph occurred in 2006 February. Photometric data presented here show evidence of the resumption of optical flickering, indicating re-establishment of accretion by day 241 of the outburst. Magnitude variations of up to 0.32 mag in V band and 0.14 mag in B band on time-scales of 600–7000 s are detected. Over the two-week observational period, we also detect a 0.5 mag decline in the mean brightness, from V≈ 11.4 to 11.9, and record B≈ 12.9 mag. Limits on the mass accretion rate of Graphic are calculated, which span the range of accretion rates modelled for direct wind accretion and Roche lobe overflow mechanisms. The current accretion rates make it difficult for thermonuclear runaway models to explain the observed recurrence interval, and this implies average accretion rates are typically higher than seen immediately post-outburst.

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Citation

Monthly Notices of the Royal Astronomical Society, 2007, 379 (4), pp. 1557-1561

Version

VoR (Version of Record)

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Monthly Notices of the Royal Astronomical Society

Publisher

Royal Astronomical Society (RAS)

issn

0035-8711

eissn

1365-2966

Copyright date

2007

Available date

24/10/2012

Publisher version

http://mnras.oxfordjournals.org/content/379/4/1557

Language

en

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