Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...238..221b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 238, no. 1-2, Nov. 1990, p. 221-226.
Astronomy and Astrophysics
Astrophysics
11
Chromosphere, Dwarf Stars, Late Stars, M Stars, Stellar Activity, Emission Spectra, Iue, Lyman Alpha Radiation, Stellar Atmospheres, Ultraviolet Spectra
Scientific paper
Ultraviolet spectra of the two dM stars Gl380 and Gl411 and the dM(e) Gl900 are presented. The dM stars show mean surface fluxes in a variety of emission lines arising throughout the chromosphere and the lower transition region which are very similar to those of the quiet sun. In the one star in which it could be determined the electron density at log T(e) was roughly 4.75, also within a factor of roughly 2.5 that of the solar value. Results for a single dM(e) star indicate higher mean surface fluxes in these same lines, consistent with the view that they are intermediate between the dM and the dMe stars.
Byrne Brendan P.
Doyle Gerry J.
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