Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...270l..17a&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 270, July 1, 1983, p. L17-L21.
Astronomy and Astrophysics
Astrophysics
21
Chromosphere, High Dispersion Spectrographs, Red Dwarf Stars, Stellar Spectra, Ultraviolet Spectra, Emission Spectra, Iue, Line Spectra, Main Sequence Stars, Spectrum Analysis
Scientific paper
It is pointed out that the red dwarfs are the smallest, coolest, faintest, least massive, but most common of normal main-sequence stars. The dMe (H-alpha emission) subclass of the red dwarfs exhibits the largest median soft X-ray to bolometric luminosity ratio of any group of late-type stars. In connection with the present investigation, attention is given to the first high-dispersion spectra of the chromospheric (6000 K) and higher temperature (up to 100,000 K) emissions of a dMe star, AU Microscopii in the far-ultraviolet (1150-2000 A) and middle-ultraviolet (2000-3000 A) bands accessible to the International Ultraviolet Explorer (IUE). AU Mic is one of the most luminous of lower main-sequence stars in C IV and soft X-ray emission.
Ayres Thomas R.
Eriksson Kimmo
Linsky Jeffrey L.
Stencel Robert E.
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