A rapid H alpha change in X Persei

Details A rapid H alpha change in X Persei A rapid H alpha change in X Persei

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ap%26ss.208..319g&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 208, no. 2, p. 319-326

Astronomy and Astrophysics

Astronomy

2

B Stars, Emission Spectra, H Alpha Line, Main Sequence Stars, Variable Stars, X Ray Astronomy, X Ray Sources, Accretion Disks, Spectrum Analysis, Stellar Models, Stellar Rotation

Scientific paper

A trend of decreasing H alpha emission over a period of thirty minutes is apparent in a series of spectra of X Persei taken on 31 December, 1987. This change appears to be astrophysical in origin and it indicates an anomalous state for X Persei that may be linked to its transition from a Be star to a normal B star, which occurred sometime between March 1988 and November 1990.

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