Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ap%26ss.121..265c&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 121, no. 2, April 1986, p. 265-271.
Astronomy and Astrophysics
Astrophysics
7
Peculiar Stars, Stellar Mass Accretion, Stellar Spectrophotometry, Ubv Spectra, Fourier Transformation, Light Curve, Spectral Energy Distribution, Spectrum Analysis, Starspots, Stellar Color, Stellar Evolution
Scientific paper
UBV photometry of the peculiar star FK Comae, obtained during the period January-June 1983, is presented. The amplitude of the photometric variation has raised with respect to the previous observations performed in 1981 and 1982, attaining about 0.18 mag in the V filter. Color curves indicate that the star is redder at minimum light; this fact is consistent with both the models presented to explain the properties of FK Comae. A Fourier analysis of the light curves available in the literature has been performed; the phases of minimum and maximum light turn out to be noticeably stable in time. This fact is difficult to be reconciled with the hypothesis of dark spots that are observed to migrate in other active stars. Rather, it could be explained by the model of Walter and Basri (1982a, b), implying an extremely evolved Algol-type system accreting mass on its primary component.
Busso Maurizio
Cellino Alberto
Scaltriti Franco
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