Observations of the H-alpha emission line in the spectrum of Chi CYG

Details Observations of the H-alpha emission line in the spectrum of Chi CYG Observations of the H-alpha emission line in the spectrum of Chi CYG

Apr 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978sva....22..206d&link_type=abstract

(Astronomicheskii Zhurnal, vol. 55, Mar.-Apr. 1978, p. 358-362.) Soviet Astronomy, vol. 22, Mar.-Apr. 1978, p. 206-208. Transla

Astronomy and Astrophysics

Astronomy

2

Emission Spectra, H Alpha Line, Stellar Spectra, Variable Stars, Balmer Series, Shock Waves, Stellar Luminosity

Scientific paper

Variations of H-alpha emission profile have been obtained for the long-period variable Chi Cyg during one cycle. Intensities, equivalent widths, and relative shifts of the emission line were measured. Before maximum light the H-alpha profile consisted of two components which existed for no longer than 10 days. Some explanations of that fact are discussed. The H-alpha luminosity of the star changed from 6.7 by 10 to the 32nd power erg/sec at maximum to no more than 10 to the 31st power erg/sec at minimum light.

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