文章基本信息

标题：Symbiotic Nova PU Vul - 33 Years of Observations
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作者：S. Shugarov ; D. Chochol ; E. Kolotilov 等
期刊名称：Open Astronomy
电子版ISSN：2543-6376
出版年度：2012
卷号：21
期号：1-2
页码：150-156
DOI：10.1515/astro-2017-0369
语种：English
出版社：Walter de Gruyter GmbH & Co. KG
摘要：AbstractWe present UBVRI light curves of the symbiotic nova PU Vul after its outburst in 1978. Three observed eclipses of the hot component by the cool one were used to determine the ephemeris of the binary system as JD (Min I) = 2444550(15) + 4897(10) × E days. the 194-day shift of the secondary minimum from its expected positions in 2001 suggests the eccentricity of the binary orbit. Period analysis of the VRI photometry improved the pulsation period of the cool AGB variable in the system to P = 217.7 days. Pulsation of the cool component is detected only in the phases around the primary minimum, when the visible hemisphere of the AGB star is not influenced by the interaction with the hot component.
关键词：KeywordsstarsbinariessymbioticnovaeeclipsingAGBtechniquesphotometric