{"title":"A comprehensive study of the sdB+dM binary TYC 3315-1807-1","authors":"J. Rukmini, D. S. Priya, P. Jishnu, G. V. Kumar","doi":"10.31577/caosp.2020.50.2.627","DOIUrl":null,"url":null,"abstract":"TYC 3315-1807-1 is an sdB+dM binary first reported by Kawka et al. (2010). Archival photometric data indicate the presence of a secondary companion causing a large reflection effect. Spectroscopic observations of the object were carried out from Vainu Bappu Observatory, Kavalur, to probe the nature of the secondary companion and to understand the post commonenvelope evolution of such objects. Spectral line equivalent widths (EW) exhibit orbital phase dependent variations, indicating the probable contribution from the secondary. A period variation study of the object was carried out using times of minima obtained from the literature and suggesting a decrease in period. The evolutionary state of the system is evaluated and discussed.","PeriodicalId":50617,"journal":{"name":"Contributions of the Astronomical Observatory Skalnate Pleso","volume":"11 1","pages":"627-629"},"PeriodicalIF":0.4000,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Contributions of the Astronomical Observatory Skalnate Pleso","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.31577/caosp.2020.50.2.627","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
引用次数: 0
Abstract
TYC 3315-1807-1 is an sdB+dM binary first reported by Kawka et al. (2010). Archival photometric data indicate the presence of a secondary companion causing a large reflection effect. Spectroscopic observations of the object were carried out from Vainu Bappu Observatory, Kavalur, to probe the nature of the secondary companion and to understand the post commonenvelope evolution of such objects. Spectral line equivalent widths (EW) exhibit orbital phase dependent variations, indicating the probable contribution from the secondary. A period variation study of the object was carried out using times of minima obtained from the literature and suggesting a decrease in period. The evolutionary state of the system is evaluated and discussed.
TYC 3315-1807-1是由Kawka et al.(2010)首次报道的sdB+dM双星。存档的光度数据表明，存在一个次级伴星，造成了很大的反射效应。该天体的光谱观测是在卡瓦鲁的Vainu Bappu天文台进行的，目的是探测次级伴星的性质，并了解这类天体在共同包络层后的演化。谱线等效宽度(EW)表现出轨道相位相关的变化，表明可能来自次级的贡献。使用从文献中获得的最小值进行了对象的周期变化研究，并建议周期减少。对系统的演化状态进行了评价和讨论。
期刊介绍：
Contributions of the Astronomical Observatory Skalnate Pleso" (CAOSP) is published by the Astronomical Institute of the Slovak Academy of Sciences (SAS). The journal publishes new results of astronomical and astrophysical research, preferentially covering the fields of Interplanetary Matter, Stellar Astrophysics and Solar Physics. We publish regular papers, expert comments and review contributions.
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