Variability in the cycle length of the supersoft source RX J0513.9-6951

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dc.creatorBurwitz, V.
dc.creatorReinsch, K.
dc.creatorGreiner, J.
dc.creatorMeyer-Hofmeister, E.
dc.creatorMeyer, F.
dc.creatorWalter, F. M.
dc.creatorMennickent, R. E.
dc.date2008-02-14
dc.date.accessioned2026-07-07T09:20:46Z
dc.date.available2026-07-07T09:20:46Z
dc.descriptionThe supersoft X-ray binary RX J0513.9-6951 shows cyclic changes between optical-low / X-ray-on states and optical-high / X-ray-off states. It is supposed to be accreting close to the Eddington-critical limit and driven by "accretion wind evolution". We seek to derive the variations in the characteristic time scales of the long-term optical light curve and to determine the implications for the physical parameters of the system. We used existing and new optical monitoring observations covering a total time span of 14 years and compared the durations of the low and high states with the model calculations of Hachisu & Kato. The cycle lengths and especially the durations of the optical high states show a longterm modulation with variations that, according to the accretion wind evolution model, would imply variations in the mass transfer rate by a factor of 5 on timescales of years.
dc.description6 Pages, 5 Figures
dc.identifierhttps://arxiv.org/abs/0802.1998
dc.identifierhttp://arxiv.org/abs/0802.1998
dc.identifierdoi:10.1051/0004-6361:20067010
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/154827
dc.subjectAstrophysics
dc.titleVariability in the cycle length of the supersoft source RX J0513.9-6951
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