Analysis of the photometric variability of WR40

Details Analysis of the photometric variability of WR40 Analysis of the photometric variability of WR40

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.238...97g&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 238, May 1, 1989, p. 97-113. Research supported by FNRS

Physics

11

Astronomical Photometry, Periodic Variations, Variable Stars, Wolf-Rayet Stars, Amplitudes, Data Reduction, Power Spectra, Stellar Physics

Scientific paper

New photometric data on the star WR40 are presented and, together with data already published, are analyzed in a detailed and homogeneous manner in order to investigate the variability of the star. Good evidence is presented for the existence of a periodicity P = 6.250 + or - 0.078 day with a semiamplitude of 0.010 mag in the Stromgren b filter. Only part of the 0.1 mag peak-to-peak variation of the star can be explained in this way and other interesting features of the variability are outlined. The physical origin of the periodicity is discussed.

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