Superhumps in cataclysmic binaries - XXII. 1RXS J232953.9+062814

David R. Skillman, Thomas Krajci, Edward Beshore, Joseph Patterson, Jonathan Kemp, Donn Starkey, Arto Oksanen, Tonny Vanmunster, Brian Martin, Robert Rea

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

We report photometry of a recently discovered dwarf nova with a remarkably short 64.2 minute orbital period. In quiescence, the star's light curve is that of a double sinusoid, arising from the "ellipsoidal" distortion of the Roche-lobe-filling secondary. During superoutburst, common superhumps develop with a period 3%-4% longer than Porb. This indicates a mass ratio M2/M1 = 0.19 ± 0.02, a surprisingly large value in so compact a binary. This implies that the secondary star has a density 2-3 times higher than that of other shortperiod dwarf novae, suggesting a secondary enriched by H-burning prior to the common-envelope phase of evolution. We estimate i = 50° ± 5°, M1 = 0.63-0.09+0.12 M, M2 = 0.12-0.02-0.03 M, R2 = 0.121-0.007-0.010 R., and a distance to the binary of 180 ± 40 pc.

Original languageEnglish (US)
Pages (from-to)630-635
Number of pages6
JournalPublications of the Astronomical Society of the Pacific
Volume114
Issue number796
DOIs
StatePublished - 2002

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Skillman, D. R., Krajci, T., Beshore, E., Patterson, J., Kemp, J., Starkey, D., Oksanen, A., Vanmunster, T., Martin, B., & Rea, R. (2002). Superhumps in cataclysmic binaries - XXII. 1RXS J232953.9+062814. Publications of the Astronomical Society of the Pacific, 114(796), 630-635. https://doi.org/10.1086/341692