BeppoSAX observations of the long period polar system V1309 Ori

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dc.creatorde Martino, D.
dc.creatorBarcaroli, R.
dc.creatorMatt, G.
dc.creatorMouchet, M.
dc.creatorBelloni, T.
dc.creatorBeuermann, K.
dc.creatorChiappetti, L.
dc.creatorDone, C.
dc.creatorGaensicke, B. T.
dc.creatorLa Franca, F.
dc.creatorMukai, K.
dc.date1998-02-19
dc.date.accessioned2026-07-07T02:26:08Z
dc.date.available2026-07-07T02:26:08Z
dc.descriptionWe present BeppoSAX observations of the peculiar long period polar system V1309 Ori (RXJ0515.6+0105). The source was detected simultaneously at soft and, for the first time, at hard X-rays with the LECS and the MECS detectors. Both, the LECS and the MECS light curves are irregular with a bursting/flaring type behaviour indicating inhomogeneous accretion onto the white dwarf. This peculiar variability, together with an extreme high soft-to-hard X-ray luminosity ratio, indicates that in V1309 Ori accretion occurs predominantly in highly compressed chunks or ``blobs'' of matter. From coordinated ESO optical spectroscopy, we find indications that the magnetic field strength of the white dwarf is < 70 MG, not expected either from the 8 hr orbital period synchronism or from the strong soft-to-hard X-ray ratio suggesting alternative solutions for sustaining synchronism in this system.
dc.description6 pages A&A-Latex, 3 Figures, accepted for publication in A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/9802254
dc.identifierhttp://arxiv.org/abs/astro-ph/9802254
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/12149
dc.subjectAstrophysics
dc.titleBeppoSAX observations of the long period polar system V1309 Ori
dc.typetext

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