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Photometry of the Cataclysmic Variables V1159 Ori and BZ UMa by Jiang Li-lian; Jiang Fang-zhou; Li Zong-yun; Zhao Ying-he; Gu Qiu-sheng is a Physics and Astronomy article available to read on EtoBox.

What is Photometry of the Cataclysmic Variables V1159 Ori and BZ UMa about?

V1159 Ori is an ER UMa sub-type cataclysmic variable belonging to the SU UMa type, and the controversial BZ UMa lies between the U Gem type and the WZ Sge type, but it possesses also the periodicity characteristics of SU UMa. We have made photometric observations of these two cataclysmic variables with the 1 m RCC optical telescope in Yunnan Astronomical Observatory from Feb. 24th to 25th, 2008. The obtained light curves of V1159 Ori exhibit superhumps in the descending stage of a normal outburst, this provides an observational evidence for the universal existence of superhumps in ER UMa-type stars. During our observations BZ UMa was at the maximum of an outburst, but no evident superhump period was detected. The previous observations made by AAVSO (American Association of Variable Star Observers) also have never found any definite superhump. This demonstrates that BZ UMa probably is not a SU UMa-type variable. According to the range of its magnitude variations, BZ UMa is closer to WZ Sge.

Who reads Photometry of the Cataclysmic Variables V1159 Ori and BZ UMa?

Author

Jiang Li-lian; Jiang Fang-zhou; Li Zong-yun; Zhao Ying-he; Gu Qiu-sheng

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0275-1062)

Published

2010

Language

EN

Field

Physics and Astronomy (Physical Sciences)