Abstract
view Abstract Citations (149) References (55) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Chromospheric scaling laws, width-luminosity correlations, and the Wilson-Bappu effect. Ayres, T. R. Abstract Simple scaling laws for the thickness and mean electron density of stellar chromospheres as functions of surface gravity and chromospheric heating are proposed. These scaling laws are shown to be a consequence of hydrostatic equilibrium, the influence of gas ionization on plasma cooling functions, and the assumption that chromospheric heating is relatively constant with height. It is argued that line width-luminosity correlations similar to those observed in the Ca II K and Mg II k resonance lines are implied by the chromospheric scaling laws if the outer edges of the K and k emission cores are formed in the Lorentzian wings of the absorption profile. The results are compared with the Wilson-Bappu effect, empirical width-luminosity correlations for Ca II K1 minimum features, and solar-plage profiles of the Ca II K and Mg II k resonance lines. Publication: The Astrophysical Journal Pub Date: March 1979 DOI: 10.1086/156873 Bibcode: 1979ApJ...228..509A Keywords: Chromosphere; Late Stars; Scaling Laws; Stellar Luminosity; Correlation; Electron Density (Concentration); Emission Spectra; Optical Thickness; Spectral Line Width; Astrophysics; Emission Lines:Stellar Chromospheres; Stellar Chromospheres:Models full text sources ADS |
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