1997/10/01 by Daisaku Nogami, S. Masuda, Takeo Kato · 4 citations
Physics and Astronomy · Engineering · #Astrophysical Phenomena and Observations #Astronomical Observations and Instrumentation #Astronomy and Astrophysical Research #Physics #Dwarf nova #Astrophysics #Stars #Amplitude #Astronomy #White dwarf
paper · pdf · doi:10.1086/133983
openalex publication_date 1997/10/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
We present observations of SX LMi obtained 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 superoutbursts to be about 35 d and 250 d, repsectively, from outburst records by RoboScope (Indiana University) and amateur observers. These recurrence cycles are typical values for normal SU UMa stars. However, the outburst amplitude (∼3.8 mag) of SX LMi is small for an SU UMa star 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.