Macro- and micro-turbulent filter functions for weak lines in stellar atmospheres

Details Macro- and micro-turbulent filter functions for weak lines in stellar atmospheres Macro- and micro-turbulent filter functions for weak lines in stellar atmospheres

Mar 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979ap%26ss..61..129v&link_type=abstract

Astrophysics and Space Science, vol. 61, no. 1, Mar. 1979, p. 129-141.

Astronomy and Astrophysics

Astrophysics

5

Distribution Functions, Isotropic Turbulence, Line Spectra, Linear Filters, Stellar Atmospheres, Equations Of Motion, Line Shape, Solar Spectra, Stellar Spectrophotometry, Supergiant Stars, Velocity Distribution

Scientific paper

Profiles of weak spectral lines are calculated for an idealized stellar atmosphere and various values of a dimensionless wave number. The cases of solar and stellar isotropic turbulence and of stellar radial pulsations are considered. Both microturbulent and macroturbulent filter functions, which relate the energy of turbulent motion to the turbulence spectrum, are computed for each case. Applications of a diagnostic method based on the filter functions to the solar motion field, supergiants, and a pulsation of Delta Cephei are briefly discussed.

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