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Observations of the recent disc loss in X Persei: photometry and polarimetry

Roche, P.; Larionov, V.; Tarasov, A. E.; Fabregat, J.; Clark, J. S.; Coe, M. J.; Kalv, P.; Larionova, L.; Negueruela, I.; Norton, A. J. and Reig, P. (1997). Observations of the recent disc loss in X Persei: photometry and polarimetry. Astronomy & Astrophysics, 322 pp. 139–146.

URL: http://aa.springer.de/bibs/7322001/2300139/small.h...
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Abstract

We present optical and infrared photometric observations of the Be/X-ray binary system X Persei/4U0352+30 during the past decade, covering the entire phase change from Be to OB star and back. Intrinsic colours are derived based on observations during the disk-less phase, giving E(B-V) =0.36±0.02, (B-V)0=-0.22±0.02 and (U-B)0=-1.05±0.02, suggesting a B0V star at a distance of 900pc±300pc and an extinction of Av=1.16±0.03.We find evidence for only one variable component, presumed to be the disc. We present measurements of the intrinsic polarisation, and an estimate of the interstellar polarisation. Polarimetric observations reveal major changes in the degree of polarisation, indicating the reformation of a scattering envelope around the star, but these are inconsistent with the predictions of standard Be envelopes models, possibly as a result of geometrical effects.

Item Type: Journal Article
Copyright Holders: 1997 European Southern Observatory (ESO)
ISSN: 1432-0746
Keywords: stars; polarization; accretion disks
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 19109
Depositing User: Users 9108 not found.
Date Deposited: 09 Dec 2009 14:19
Last Modified: 10 Oct 2014 09:05
URI: http://oro.open.ac.uk/id/eprint/19109
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