The period changes of BW Vulpeculae

Details The period changes of BW Vulpeculae The period changes of BW Vulpeculae

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985acaps...5..117j&link_type=abstract

(Acta Astrophysica Sinica, vol. 5, no. 1, 1985, p. 117-123) Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 9, Sept. 1

Astronomy and Astrophysics

Astrophysics

2

Astronomical Photometry, Cepheid Variables, Stellar Orbits, Eccentric Orbits, Time Series Analysis

Scientific paper

The results of photoelectric photometry observations of the period changes in BW Vulpeculae, the Beta Cephei variable with the largest amplitude, are reported. The period is found to be increasing all the time at a rate of (14.24 + or - 0.20) x 10 to the -10th d/d. The residual in the time of the light maximum shows a quasi-sinusoidal variation with a period of about 26.3 years and an amplitude of 0.022-0.024 days. If this is interpreted as the light-time effect in a binary orbit, then that orbit will have a size of 1.91-2.08 AU and an eccentricity of 0.52.

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