Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ap%26ss.202..121s&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 202, no. 1, p. 121-154.
Astronomy and Astrophysics
Astrophysics
42
A Stars, Annual Variations, B Stars, Light Curve, Digital Systems, Image Classification, Power Spectra, Ubv Spectra
Scientific paper
Digital analysis methods are used to study the light curves of 78 Herbig Ae/Be stars. The mean epoch for a star is 5 yr. A morphological classification of the light curves is proposed. The digital analysis method is briefly described. To estimate the reliability of the cyclic phenomena discovered in the present study, a large number of them are examined. Three types of cyclic phenomena are identified and discussed. These phenomena are interpreted in terms of Keplerian rotation of various structures in accretion disks and formations. The hypothesis of giant protocomets is suggested to explain P(0) periods. Short-period cyclicity is associated with the variation of hot compact shell shapes modulated by rotation.
Grankin Konstantin N.
Ibragimov M. A.
Mel'nikov Yu. S.
Shevchenko Sergey. V.
Yakubov S. D.
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