Variations in the chromospheric CA II lines of Alpha Orionis

Details Variations in the chromospheric CA II lines of Alpha Orionis Variations in the chromospheric CA II lines of Alpha Orionis

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...226l..17t&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 226, no. 1, Dec. 1989, p. L17-L19.

Astronomy and Astrophysics

Astrophysics

5

Calcium, Chromosphere, Line Spectra, Stellar Mass Ejection, Stellar Spectra, Supergiant Stars, Flux Density, Spectrum Analysis, Stellar Winds

Scientific paper

The discovery of a strong increase of the flux in the chromospheric Ca
II K2 reversal of Alpha Ori is reported. The increase includes the
Lorentz-wings of the line until about 5 A from the center. The
variations were found in a monitoring program for medium- and long-term
variations in circumstellar lines of several late-type stars.

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