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FS Aur as a Permanent Superhump System

Published online by Cambridge University Press:  22 February 2018

Gaghik H. Tovmassian  and
Sergei V. Zharikov
Gaghik H. Tovmassian
Affiliation:
Instituto de Astronomía, UNAM, Ensenada, México
Sergei V. Zharikov
Affiliation:
Instituto de Astronomía, UNAM, Ensenada, México

Abstract

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We discovered that the short period cataclysmic variable FS Aur at some epochs shows a photometric period close to the orbital. It exceeds the orbital period by ∽2%, which is a sign of the presence of a permanent superhump in the system. Superhumps tend to appear near short, low amplitude outbursts. We assume that FS Aur possesses a large thermally stable accretion disc and that the outburst may be due to the variable mass transfer rate. This, however, does not alter our previous explanation of yet another, 2.4 times longer than orbital, photometric period of FS Aur, found earlier, and persistently observed in its light curves.

Resumen

Resumen

Descubrimos que la Variable Cataclismica FS Aur de corto periodo orbital muestra periodo fotométrico cercano a orbital. El exceso de periodo coincide con lo que se espera de un sistema que cueuta eon la presencia de superjorobas permanentes. Esto puede ser resultado de que FS Aur posea un disco grande y estable. Sin embargo el sistema sigue mostrando persistentemente un periodo mucho más largo que el orbital y los nuevos datos no alteran las explicaciones previas de este periodo.

Keywords

Binaries: Close — NovaeCataclysmic Variables — Photometry
Type
The Contributed Papers
Information
International Astronomical Union Colloquium , Volume 194: Compact binaries in the galaxy and beyond , 2004 , pp. 169 - 171
Copyright
Copyright © Instituto de astronomia/revista mexicana de astronomίa y astrofίsica 2004

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