A 6.3-h superhump in the cataclysmic variable TV Columbae: the longest yet seen

Autor:	Velthuis, F., Mccormick, J., Bembrick, C., Bedding, T., Naylor, T., Augusteijn, T., Hellier, C., Retter, A.
Předmět:	Physics Space and Planetary Science Astrophysics (astro-ph) Current theory FOS: Physical sciences Cataclysmic variable star Astronomy and Astrophysics Astrophysics Mass ratio Orbital period
Popis:	We present results from a two week multi-longitude photometric campaign on TV Col held in 2001 January. The data confirm the presence of a permanent positive superhump found in re-examination of extensive archive photometric data of TV Col. The 6.3-h period is 15 per cent longer than the orbital period and obeys the well known relation between superhump period excess and binary period. At 5.5-h, TV Col has an orbital period longer than any known superhumping cataclysmic variable and, therefore, a mass ratio which might be outside the range at which superhumps can occur according to the current theory. We suggest several solutions for this problem. Comment: 8 pages, 1 Latex file, 7 eps figures, MNRAS, accepted
Databáze:	OpenAIRE
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