Investigation of the atmosphere of the supergiant Alpha CYG (A2Ia)

Details Investigation of the atmosphere of the supergiant Alpha CYG (A2Ia) Investigation of the atmosphere of the supergiant Alpha CYG (A2Ia)

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993azh....70...82s&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 70, no. 1, p. 82-90.

Computer Science

Sound

4

Stellar Atmospheres, Stellar Temperature, Supergiant Stars, Magnetohydrodynamic Turbulence, Metallicity, Stellar Luminosity, Stellar Mass

Scientific paper

The atmosphere model method is used to analyze the star Alpha Cyg (A2Ia). The following parameters of effective temperature and surface gravity are obtained: 9100 K and 1.2, respectively. A strong relationship between the microturbulent velocity and the observed equivalent widths is found. The microturbulent velocity in the upper layers of the atmosphere is shown to exceed the sound velocity. The metal abundance in the atmosphere of Alpha Cyg is generally close to that of the sun.

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