CA II emission from stellar chromospheres

Details CA II emission from stellar chromospheres CA II emission from stellar chromospheres

Jan 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....71...14c&link_type=abstract

Astronomy and Astrophysics, vol. 71, no. 1-2, Jan. 1979, p. 14-18.

Astronomy and Astrophysics

Astrophysics

13

Calcium, Chromosphere, Ion Emission, Late Stars, Stellar Atmospheres, Stellar Spectra, Line Spectra, Metal Ions, Spectral Line Width, Stellar Spectrophotometry

Scientific paper

Measurements are presented of the separations of the K2 peaks and the K1 dips of the emission core of the Ca II K line observed on high-dispersion spectra of 33 late-type stars. These separations (called W1 and W2) are compared with the emission core width W which satisfies the Wilson-Bappu correlation. With some qualifications, it is found that W is directly proportional to the 1.3 power of W1 and the 1.06 power of W2. Some consequences of this result are discussed.

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