The behaviour of Ca II lines of giants and supergiants in the light of stellar winds.

Details The behaviour of Ca II lines of giants and supergiants in the light of stellar winds. The behaviour of Ca II lines of giants and supergiants in the light of stellar winds.

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990rmxaa..21..421g&link_type=abstract

Revista Mexicana de Astronomia y Astrofisica, Vol. 21, p. 421 - 423

Astronomy and Astrophysics

Astronomy

Late-Type Giants: Calcium Lines, Late-Type Giants: Stellar Winds, Late-Type Supergiants: Calcium Lines, Late-Type Supergiants: Stellar Winds, Stellar Winds: Heating

Scientific paper

Coudé IIaO plates of thirty-five southern K-M giants and supergiants were obtained in the H and K lines of Ca II. Ca II K line intensity varies with temperature in a similar way as do transition region lines and coronal X-ray emission. This indicates that magnetic heating plays a certain role in the heating of the outer layers of late-type stars.

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