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Geometrical Constraints on the Hot Spot in Beta Lyrae

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arxiv 1108.3015 v2 pith:SNKZWMWM submitted 2011-08-15 astro-ph.SR

Geometrical Constraints on the Hot Spot in Beta Lyrae

classification astro-ph.SR
keywords datacurvelightspottakenyearsaccretionallows
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present results from six years of recalibrated and new spectropolarimetric data taken with the University of Wisconsin's Half-Wave Spectropolarimeter (HPOL) and six years of new data taken with the photoelastic modulating polarimeter (PEMP) at the Flower and Cook Observatory. Combining these data with polarimetric data from the literature allows us to characterize the intrinsic BVRI polarized light curves. A repeatable discrepancy of 0.245 days (approximately 6 hours) between the secondary minima in the total light curve and the polarization curve in the V band, with similar behavior in the other bands, may represent the first direct evidence for an accretion hot spot on the disk edge.

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