Search for random fluctuations in periods of Cepheids

摘要：

A total of 94269 unfiltered CCD observations for 16 of the brightest galactic Cepheids, obtained by the SMEI instrument, were reduced with the Hertzsprung method to define individual times of light maxima. Then O-C residuals for all of 16 Cepheids were analyzed with the Eddington-Plakidis method and random fluctuations in periods for four of them, SU Cas (P=ld.95), δ Cep (P=5d.37), k Pav (P=9d.O9), and α UMi (P=3d.97) were detected. Such fluctuations for short period Cepheids are found for the first time. O-C diagrams as well as results of the Eddington-Plakidis test are presented.

作者: Berdnikov Leonid N Stevens Ian R

作者单位: Steinberg Astronomical Institute, 13, Universitetsky prosp., 119992 Moscow, Russia School of Physics and Astronomy,University of Birmingham, Birmingham B15 2TT,United Kingdom

会议类型: 国际会议

会议名称: International Conference on Space Information Technology 2009(2009年第三届空间信息技术国际会议)

会议地点: 北京

会议语种:英文

页码: 1-7

在线出版日期: 2009-11-26（万方平台首次上网日期，不代表论文的发表时间）