A 6.4-hr positive superhump period in TV Col

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dc.creatorRetter, A.
dc.creatorHellier, C.
dc.date1999-05-28
dc.date.accessioned2026-07-07T02:31:45Z
dc.date.available2026-07-07T02:31:45Z
dc.descriptionRe-examination of photometric data of TV Col (Hellier, 1993) reveals positive superhumps in addition to the negative superhumps previously known. The superhump period is 0.265+/-0.005 day - about 16 percent longer than the orbital period - which obeys the relation between superhump-period excess and orbital period (Stolz and Schoembs 1984). As a confirmed permanent superhumper, the accretion disc of TV Col is naturally thermally stable. Therefore, our result supports the idea of Hellier and Buckley (1993) that the short-term outbursts seen in its light curve are mass transfer events rather than thermal instabilities in the disc. At 5.5-hr, TV Col has a longer orbital period than any known superhumper, and thus a mass ratio which is probably outside the range at which superhumps can occur according to current theory.
dc.description2 pages, Latex file, 2 .eps files. to appear in "Cataclysmic Variables: a 60th Birthday Symposium in Honour of Brian Warner", held in Oxforf, 12-16/4/99, eds. P. Charles, A. King, D. O'Donoghue, New Astronomy Reviews. also available at: ftp://ftp.astro.keele.ac.uk/pub/preprints/Oxford.html
dc.identifierhttps://arxiv.org/abs/astro-ph/9905376
dc.identifierhttp://arxiv.org/abs/astro-ph/9905376
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/14266
dc.subjectAstrophysics
dc.titleA 6.4-hr positive superhump period in TV Col
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