Theoretical temperature minima for Arcturus /K 2 IIIp/, a possible explanation of the Wilson-Bappu effect

Details Theoretical temperature minima for Arcturus /K 2 IIIp/, a possible explanation of the Wilson-Bappu effect Theoretical temperature minima for Arcturus /K 2 IIIp/, a possible explanation of the Wilson-Bappu effect

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....74..229u&link_type=abstract

Astronomy and Astrophysics, vol. 74, no. 2, Apr. 1979, p. 229-234.

Astronomy and Astrophysics

Astrophysics

17

Chromosphere, K Lines, Stars, Stellar Models, Stellar Temperature, Acoustic Propagation, Atmospheric Heating, Atmospheric Models, Damping, Minima, Sun

Scientific paper

The temperature minimum and acoustic flux at the base of the chromosphere are determined theoretically for Arcturus. The results are combined with values previously derived for the sun, and a tentative explanation of the Wilson-Bappu effect is given in terms of the acoustic heating mechanism. Additional chromospheric heating mechanisms are considered which are suggested by the secular variability of Ca II K2 emission.

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