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A Reprise of the Properties of the Exotic Eclipsing Binary RT Lacertae

Published online by Cambridge University Press:  12 April 2016

E.F. Milone
E.F. Milone*
Affiliation:
RAO, The University of Calgary, Physics & Astronomy Department, 2500 University Drive, NW, Calgary, AB, T2N IN4, Canada

Abstract

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The 5.07-d eclipsing system RT Lacertae is at the interface of Algol systems and RS CVn-type systems. Three strong lines of evidence support its Algolid nature: gas streaming; the close proximity of the larger star to its Roche lobe; and evidence of circumstellar material. Supporting the stellar activity model are moderately successful, if non-unique, modeling of light curve anomalies and ‘migration waves’ with star spot models, and a general expectation based on similarities to RS CVn-like systems. Recent work by Lanza et al. (2002) provides support for the latter class of models, but other light curve analyses and non-optical passband studies are examined below and directions for the resolutions of the problems and paradoxes presented by the RT Lac system are provided. An observational campaign to acquire simultaneous spectroscopic, photometric, and polarimetric data is suggested.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 187: Exotic Stars as Challenges to Evolution , 2002 , pp. 65 - 71
Copyright
Copyright © Astronomical Society of the Pacific 2002

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