The photometric period of 39 AY Ceti

Details The photometric period of 39 AY Ceti The photometric period of 39 AY Ceti

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..93..271e&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 93, no. 2, June 1983, p. 271-276.

Astronomy and Astrophysics

Astrophysics

12

Binary Stars, Electrophotometry, Light Curve, Ubv Spectra, Variable Stars, White Dwarf Stars, Ephemerides, Orbital Elements, Radial Velocity, Stellar Magnitude, Stellar Rotation

Scientific paper

A photometric period of 77.65 days is derived for 39 AY Ceti through a comparison of photoelectric photometry obtained in 1971 and 1972 with that obtained in the periods 1980-1981 and 1981-1982. JD 2444636.0 is an epoch of minimum light, and the full amplitude is found to have been as large as 0.18 mag in V. It is noted that the mean light level has dropped by almost 0.2 mag over the last decade. The present binary star is also noteworthy in light of the recently discovered white dwarf secondary component, and because radial velocity measurements indicate an eccentricity as large as 0.1 and an orbital period which, at 57.1 days, differs considerably from the photometric period presented.

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