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Proceedings Paper

Search for random fluctuations in periods of Cepheids
Author(s): Leonid N. Berdnikov; Ian R. Stevens
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Paper Abstract

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=1d.95), δ Cep (P=5d.37), κ Pav (P=9d.09), 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.

Paper Details

Date Published: 2 April 2010
PDF: 7 pages
Proc. SPIE 7651, International Conference on Space Information Technology 2009, 76510W (2 April 2010); doi: 10.1117/12.855577
Show Author Affiliations
Leonid N. Berdnikov, Sternberg Astronomical Institute (Russian Federation)
Ian R. Stevens, The Univ. of Birmingham (United Kingdom)

Published in SPIE Proceedings Vol. 7651:
International Conference on Space Information Technology 2009
Xingrui Ma; Baohua Yang; Ming Li, Editor(s)

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