Evidence of high chromospheric activity in Hyades dwarfs from spectroscopic observations

Details Evidence of high chromospheric activity in Hyades dwarfs from spectroscopic observations Evidence of high chromospheric activity in Hyades dwarfs from spectroscopic observations

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...123...89c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 123, no. 1, June 1983, p. 89-92.

Astronomy and Astrophysics

Astrophysics

28

Chromosphere, Dwarf Stars, Infrared Spectra, Stellar Spectra, Ceres Asteroid, H Alpha Line, Oscillator Strengths, Solar Spectra, Spectral Line Width, Stellar Models

Scientific paper

The Hα Balmer line and the infrared Ca II triplet have been observed in two solar type dwarfs of the Hyades at the Coudé Spectrograph of the Canada-France-Hawaii Telescope. Noticeable differences appear in the cores of the lines between the stellar spectra and the solar spectrum (moonlight). These differences are ascribed to a more active chromosphere in the relatively young Hyades stars. Non-LTE computations show that the average disk of one of the Hyades dwarf is similar to a very bright element of the solar chromospheric network.

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