The chromospheric He I D3 line in main-sequence stars

Details The chromospheric He I D3 line in main-sequence stars The chromospheric He I D3 line in main-sequence stars

Jul 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...148..293d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 148, no. 2, July 1985, p. 293-298.

Astronomy and Astrophysics

Astrophysics

31

Absorption Spectra, Chromosphere, D Lines, Main Sequence Stars, Stellar Rotation, Stellar Spectra, X Ray Sources, Emission Spectra, Late Stars, Spectral Line Width, Stellar Activity, Stellar Coronas, X Ray Spectra

Scientific paper

High-resolution low-noise spectra of 21 unevolved stars of spectral types, F, G, and K and luminosity classes V or IV were examined for the chromospheric He I 5876 Å (D3) line. The equivalent width of the D3 absorption line is correlated with the coronal soft X-ray flux, and with the flux in the Ca II H and K chromospheric emission cores. Rotational modulation of the D3 line is detected in χ1Ori, and suggested for κ Cet and ɛ Eri.

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