Photometric Variability of Four Coronally Active Stars

Journal of astrophysics and astronomy

J. C. Pandey²  S. A. Drake¹  R. Sagar1²  K. P. Singh³ 

[1] Code 668, LHEA, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA.$$;State Observatory, Naini Tal 263 129, India.$$;Tata Institute of Fundamental Research, Mumbai, India.$$

关键词: Stars;    variable;    optical photometry;    X-rays;    source.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

We present photometric observations of four stars that are optical counterparts of soft X-ray/EUV sources, namely 1ES 0829+15.9, 1ES0920-13.6, 2RE J110159+223509 and 1ES 1737+61.2. We have discovered periodic variability in two of the stars, viz., MCC 527 (1ES 0829+15.9; Period = 0𝑑.828 ± 0.0047) and HD 81032 (1ES 0920-13.6; Period = ∼ 57.02 ± 0.560 days). HD 95559 (2RE J110159+223509) is found to show a period of 3𝑑. HD 160934 (1ES1737+61.2) also shows photometric variability but needs to be monitored further for finding its period. These stars most likely belong to the class of chromospherically active stars.

【 授权许可】

Unknown