Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...242..397c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 242, no. 2, Feb. 1991, p. 397-400. NNSFC-supported research.
Astronomy and Astrophysics
Astrophysics
17
Cataclysmic Variables, Dwarf Novae, Stellar Spectrophotometry, X Ray Binaries, Charge Coupled Devices, Emission Spectra, Light Curve, Schmidt Telescopes, Stellar Spectra
Scientific paper
SS Ursae Minoris was observed from March 13 to Oct. 1 of 1989 using the BAO 60/90/180 cm Schmidt telescope equipped with a Thompson CCD. Two outbursts were observed. The short time-scale light curves at outburst as well as the long time-scale light curve are presented. The presence of a 101 min periodic superhump with amplitudes of 0.3 mag in the light curves at outburst shows that SS UMi is a SU UMa dwarf nova. At quiescence the light curves show flickering of rather large amplitude without any recognizable periodic hump. Using the empirical relation between the superhump period and the orbital period, an orbital period of about 98 min is estimated.
Chen Jian-Sheng
Liu Xiao-Wei
Wei Ming Zhi
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