1965 light curves of BV Dra and BW Dra

Autor: Douglas S. Hall, Robert H. Hardie
Rok vydání: 1990
Předmět:
Zdroj: Journal of Astrophysics and Astronomy. 11:265-270
ISSN: 0973-7758
0250-6335
DOI: 10.1007/bf02709275
Popis: Differential B-band photometry of BV Dra and BW Dra, obtained in 1965, is presented. Times of primary and secondary minima are derived and combined with published times for a period study. Period variations are found in both binaries and magnetic cycles are proposed as an explanation. The cycle length is 19 years in BV Dra and 8 years in BW Dra.
Databáze: OpenAIRE
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