A new period and period changes in VZ Hydrae

Details A new period and period changes in VZ Hydrae A new period and period changes in VZ Hydrae

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ap%26ss.133...71s&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 133, no. 1, May 1987, p. 71-79.

Astronomy and Astrophysics

Astrophysics

3

Eclipsing Binary Stars, Electrophotometry, Periodic Variations, Light Elements, Orbital Elements, Spectroscopic Analysis

Scientific paper

Available times of minima are used to derive a period of 2.9042997 d for the eclipsing binary VZ Hydrae, and, although significant period changes do not appear to have occurred in this binary, it is suggested from the O-C diagram that the period of the system has a slow tendency to increase. Four period changes were found in the 1918-1978 interval, with upward trends appearing stronger than the declining trends. Secondary minima show larger fluctuations than those of the primary minima. Sinusoidal variations noted in the O-C values may be indicative of the presence of a third body.

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