The Duplicity of Large Amplitude SX Phoenicis Star CY Aquarii

Details The Duplicity of Large Amplitude SX Phoenicis Star CY Aquarii The Duplicity of Large Amplitude SX Phoenicis Star CY Aquarii

Nov 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ap%26ss.268..397z&link_type=abstract

Astrophysics and Space Science, v. 268, Issue 4, p. 397-406 (1999).

Astronomy and Astrophysics

Astrophysics

4

Scientific paper

New photoelectric times of maximum light of the large amplitude SX Phoenicis star CY Aquarii are analyzed together with times of maximum light in the literature. The general shape of the fitted curve of the observed minus calculated (O-C) times of maximum light suggest the duplicity of the variable star, which causes long-term period variations in the light-time. The period changes of CY Aqr are probably consequences of a continuously increasing period combined with the light-time effect in a binary system. The secondary companion is less massive. Some spectroscopic orbital elements are derived from the O-C diagram.

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