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Author Singh, J. ♦ Rao, P. V. ♦ Agrawal, P. C. ♦ Apparao, K. M. V. ♦ Manchanda, R. K. M. ♦ Sanwal, B. B. ♦ Sarma, M. B. K.
Source Aryabhatta Research Institute of Observational Sciences (ARIES)
Content type Text
File Format PDF
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics
Subject Keyword Binaries ♦ Close – movae ♦ Cataclysmic variables – stars ♦ KR Aurigae
Abstract We represent fast photometric observations of KR aurigae, a nove-like variable, made during 1984-1988, in the B and U bands. The light curves show large-amplitude pulsations with periods in the range 480-780 s. the period is found to be different even on consecutive nights and, therefore, these pulsations are interpreted as “quasi-periodic” in nature. The pulsation periods in the bright state are positively correlated with the source intensity, but the low-state periods do not follow this linear trend. We discuss possible explanations of the quasi-periodic oscillations. Pulsations with period in the 1050-1600 s range are also found in the data, which can be attributed to broader features seen in the light curves. We also present the X-ray results from analysis of the observations made with the Einstein Observatory. The X-ray spectrum is found to be soft with a large hydrogen column density.
Part of series apj419-337
Educational Use Research
Education Level UG and PG
Learning Resource Type Article