CA II absolute line profiles of southern late-type stars

Details CA II absolute line profiles of southern late-type stars CA II absolute line profiles of southern late-type stars

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...191..253p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 191, no. 2, Feb. 1988, p. 253-266.

Astronomy and Astrophysics

Astrophysics

64

Calcium, Late Stars, Line Spectra, Metallicity, Stellar Spectra, Chromosphere, Dwarf Stars, Giant Stars, H Lines, K Lines, Stellar Temperature

Scientific paper

The authors have used the Coudé Echelle Spectrometer and Reticon detector at the European Southern Observatory to acquire high-resolution, high-quality spectra in the H and K lines of Ca II for 50 (mostly Southern) late-type dwarfs and giants. They have developed a calibration procedure for converting the observed line profiles into absolute flux units at the star surface and derived chromospheric radiative losses in these lines. They discuss spectral features observed in stars of different effective temperature and gravity and stress the relevance of these observations for the study of stellar chromospheres.

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