Changes in the H-alpha emission line profile of the young star VY MON

Details Changes in the H-alpha emission line profile of the young star VY MON Changes in the H-alpha emission line profile of the young star VY MON

Aug 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995azh....72..539p&link_type=abstract

Astronomicheskij Zhurnal, vol. 72, p. 539

Astronomy and Astrophysics

Astronomy

1

Early Stars, Stellar Spectra, Emission Spectra, H Alpha Line, Line Shape, Stellar Winds, Astronomical Models

Scientific paper

H-alpha spectroscopy of the young star VY Mon is presented. Over the 1986-1992 period, VY Mon exhibited three types of H-alpha profiles in its spectrum: a profile with short-wavelength P Cygni absorption (from -200 to -300 km/s), a profile with blue emission (-230 to -300 km/s), and a profile with a single emission feature (+140 km/s). The change of profile type appears to occur on a time scale of the order of one month, and a particular type persists no fewer than four months. All three profile types can be explained in terms of constrained models of anisotropic stellar wind.

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