Transition regions of dM stars

Details Transition regions of dM stars Transition regions of dM stars

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281a.319b&link_type=abstract

In ESA, A Decade of UV Astronomy with the IUE Satellite, Volume 1 p 319-322 (SEE N89-10682 01-89)

Astronomy and Astrophysics

Astronomy

Flare Stars, Iue, Spaceborne Astronomy, Ultraviolet Astronomy, Ultraviolet Spectra, Chromosphere, Lyman Alpha Radiation, Stellar Activity

Scientific paper

Weak upper-chromospheric and transition region (TR) emission from two dM stars (Gl784 and Gl825) were observed using deep IUE SWP exposures. In addition to the usual TR lines, Lyman alpha fluxes for the two stars were also determined. The relative importance of Lyman alpha and Mg II as chromospheric coolants in the M dwarfs and the status of the X-ray/He II (1640A) relationship in the light of these results are discussed.

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