The Unusual Herbig Ae/Be Star XY Per A

Details The Unusual Herbig Ae/Be Star XY Per A The Unusual Herbig Ae/Be Star XY Per A

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002ap.....45..150c&link_type=abstract

Astrophysics (English translation of Astrofizika), v. 45, Issue 2, p. 150-157 (2002).

Astronomy and Astrophysics

Astrophysics

1

Stars - Peculiar Stars - Individual Stars - Xy Per A

Scientific paper

The results of an investigation of XY Per based on photoelectric observations in the Strömgren system are presented. It is shown that the brighter component in the binary system XY Per AB, classified earlier as A2 II, is a variable of the Herbig Ae/Be type. At the same time, our estimates gave M V (XY Per A) = +1.25. An analysis of the variation of the indices and c showed that XY Per A is a typical shell star: along with intense hydrogen absorption lines it displays an appreciable emission deficit in the Balmer continuum. The most noteworthy are the results of observations indicating that as the brightness decreases, the opacity of the shell increases both in lines and in the Balmer continuum. This observational fact can scarcely be explained in terms of the model of brightness variation due to dust clouds revolving around the star.

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