Stellar granulation. VI - Four-component models and non-solar-type stars

Details Stellar granulation. VI - Four-component models and non-solar-type stars Stellar granulation. VI - Four-component models and non-solar-type stars

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...228..218d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 228, no. 1, Feb. 1990, p. 218-230. Research supported by NFR.

Astronomy and Astrophysics

Astrophysics

34

Astronomical Models, Solar Granulation, Stellar Atmospheres, A Stars, F Stars, G Stars, K Stars, Stellar Activity, Stellar Luminosity, Stellar Models

Scientific paper

A series of relatively simple empirical models of inhomogeneous stellar surfaces that allow granulation properties to be estimated also in stars for which detailed hydrodynamic models cannot yet be computed (e.g., the stars of spectral types A,F,G and K, reproducing observed line asymmetries) are presented. In these models, the stellar surface is divided into four components of different brightness and velocity, and the integrated stellar line profile is obtained as a summation of profiles from different components. By matching the synthetic and observed bisector patterns, estimates of the velocity and brightness amplitudes of stellar granulation can be obtained without a major computational effort.

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