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The 1994 Super-Outburst of the New SU UMa-Type Dwarf Nova SX Leonis Minoris

Daisaku Nogami, Seiji Masuda and Taichi Kato
Publications of the Astronomical Society of the Pacific
Vol. 109, No. 740 (1997 October), pp. 1114-1121
Stable URL: http://www.jstor.org/stable/40681007
Page Count: 8
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
The 1994 Super-Outburst of the New SU UMa-Type Dwarf Nova SX Leonis Minoris
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Abstract

We present observations of SX LMi during the 1994 long outburst at Ouda Station. Superhumps, with a period of 0.06950 (±0.00002) d, are detected. This confirms SX LMi as a new member of the SU UMa-type dwarf novae. We measured the recurrence cycle of normal outbursts and super-outbursts to be about 35 d and 250 d, respectively, from outburst records by RoboScope (Indiana University) and amateur observers. These recurrence cycles are typical values for usual SU UMa stars. However, the outburst amplitude (~ 3.8 mag) of SX LMi is small for SU UMa stars and close to those of ER UMa stars. This small outburst amplitude might be understood if the viscosity at quiescence and the mass-transfer rate are slightly high in SX LMi.

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