SIMBAD references

1998A&A...332..904D - Astronomy and Astrophysics, volume 332904-908 (1998/4-3)

BeppoSAX observations of the long period polar system V1309 Ori.

DE MARTINO D., BARCAROLI R., MATT G., MOUCHET M., BELLONI T., BEUERMANN K., CHIAPPETTI L., DONE C., GAENSICKE B.T., LA FRANCA F. and MUKAI K.

Abstract (from CDS):

We present BeppoSAX observations of the peculiar long period polar system V1309 Ori (RX J0515.6+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 <70MG, not expected either from the 8hr orbital period synchronism or from the strong soft-to-hard X-ray ratio suggesting alternative solutions for sustaining synchronism in this system.

Abstract Copyright: ∼

Journal keyword(s): stars: individual: V1309 Ori = RX J0515.6+0105 - cataclysmic variables - X-rays: stars

Simbad objects: 3

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