Density sensitive C II lines in cool stars of low gravity

Details Density sensitive C II lines in cool stars of low gravity Density sensitive C II lines in cool stars of low gravity

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.196p..47s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 196, Aug. 1981, p. 47P-53P. Research supported by the Science Research

Astronomy and Astrophysics

Astronomy

77

Carbon, Cool Stars, Emission Spectra, Giant Stars, Line Spectra, Stellar Gravitation, Stellar Spectra, Supergiant Stars, Atmospheric Density, Chromosphere, Electron Density (Concentration), Stellar Atmospheres, Stellar Temperature

Scientific paper

It is shown that the relative intensities of emission lines within the multiplet UV 0.01 of C II, around 2325 A, are sensitive to electron density in the range 10 to the 9th to 10 to the 7th per cu cm. The lines therefore offer a valuable method for measuring electron densities in the chromospheres of late-type giants and supergiants. Calculated line ratios are compared with those observed in a range of objects.

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