Other
Scientific paper
Oct 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998pasp..110.1148t&link_type=abstract
The Publications of the Astronomical Society of the Pacific, Volume 110, Issue 752, pp. 1148-1155.
Other
25
Stars: Binaries: Close, Stars: Novae, Cataclysmic Variables, Stars: Variables: Other
Scientific paper
We report a spectroscopic and photometric study of the novalike variable V592 Cassiopeiae (=LS I 55 deg 8). The spectrum is that of a typical UX UMa-type star, with weak, narrow Balmer emission superposed on broad absorption. The 0.1-2.2 μm flux distribution also looks fairly normal, suggesting disk accretion at ~10^-8 M_solar yr^-1 and a distance of 330 pc. The emission lines move with P = 0.115063(1) days, which is presumably the underlying orbital period of the binary. Photometry reveals a different period, namely, 0.12228(1) days. The presence of this wave in a short-period cataclysmic variable, and the value of the period excess at 6.3%, suggests identification as a ``permanent superhump.'' After subtraction of this large signal, the residual time series appears to contain a weak feature at 0.11193(5) days. The star evidently shows positive and negative superhumps simultaneously. Its binary period puts it among a modest number of nonmagnetic cataclysmic variables occupying the 2-3 hr period ``gap.''
Fried Robert E.
Harvey David A.
Jensen Lasse
Patterson Joseph
Shugarov Sergei
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