Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ap%26ss.150..173s&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 150, no. 1, Dec. 1988, p. 173-179.
Astronomy and Astrophysics
Astrophysics
2
Astronomical Photography, Eclipsing Binary Stars, Electrophotometry, Orbital Velocity, Stellar Orbits
Scientific paper
A first period study of the eclipsing binary XY Ceti is presented. A new period of 2.7807135 days, based on all available times of minima, is given. Period changes in different portions of the O-C diagram, with a new period, have been estimated. The total change in period ranges from 1.1 x 10 to the -5 d to 1.2 x 10 to the -4 d, thus, Delta-P ranges from 3.1 x 10 to the -5 d to 3.3 x 10 to the -4 d. The O-C diagram suggests that the trend of the period has changed around the year 1959. Two portions of increasing and decreasing trends also reveal that the period changes Delta-P/P of the order of 10 to the -5 d are present, which are appreciably large.
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