Superhumps in Cataclysmic Binaries. XXII. 1RXS J232953.9+062814

Дата и время публикации : 2002-04-08T13:57:05Z

Авторы публикации и институты :
David Skillman (Center for Backyard Astrophysics-East)
Thomas Krajci (Center for Backyard Astrophysics-New Mexico)
Edward Beshore (Center for Backyard Astrophysics-Colorado)
Joseph Patterson (Columbia University)
Jonathan Kemp (Joint Astronomy Centre, Columbia University)
Donn Starkey (Center for Backyard Astrophysics-Indiana)
Arto Oksanen (Center for Backyard Astrophysics-Finland)
Tonny Vanmunster (Center for Backyard Astrophysics-Belgium)
Brian Martin (King’s University College)
Robert Rea (Center for Backyard Astrophysics-Nelson)

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Коментарии к статье: PDF, 17 pages, 3 tables, 5 figures; accepted, in press, to appear June 2002, PASP; more info at
Первичная категория: astro-ph

Все категории : astro-ph

Краткий обзор статьи: We report photometry of 1RXS J232953.9+062814, 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 P_orb. This indicates a mass ratio M_2/M_1=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 short-period dwarf novae, suggesting a secondary enriched by H-burning prior to the common-envelope phase of evolution. We estimate i=50+-5 deg, M_1=0.63 (+0.12, -0.09) M_sol, M_2=0.12 (+0.03, -0.02) M_sol, R_2=0.121 (+0.010, -0.007) R_sol, and a distance to the binary of 180+-40 pc.

Category: Physics