The light curve of BW Vulpeculae

Details The light curve of BW Vulpeculae The light curve of BW Vulpeculae

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...177..150s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 177, no. 1-2, May 1987, p. 150-154.

Astronomy and Astrophysics

Astronomy

21

Binary Stars, Cepheid Variables, Light Curve, Stellar Spectrophotometry, Infrared Astronomy, Radial Velocity, Ultraviolet Astronomy

Scientific paper

The light curve of BW Vulpeculae is discussed using the extensive data set obtained during the internatinal photometric campaign on BW Vul in 1982-1983. The data fail to reveal a single flare or discontinuous event of the kind reported on several occasions during the last three decades. The shape of the stillstand only occasionally deviates from the 'flat' type. The stillstand amplitudes are smaller and the phenomenon occurs less frequently than previously supposed. It is argued that the time of maximum as used in previous determinations of the ephemeris of this star's light variation is not a reliable quantity, and arguments are given for using time of minimum as a more appropriate parameter when discussing period variations. The residuals from a linear ephemeris for 1982-1983 show that no sudden period changes have occurred in this time interval.

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