High resolution IUE observations of the flare star AD Leonis - Implications for the MG II Wilson-Bappu effect

Details High resolution IUE observations of the flare star AD Leonis - Implications for the MG II Wilson-Bappu effect High resolution IUE observations of the flare star AD Leonis - Implications for the MG II Wilson-Bappu effect

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...208..198a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 208, no. 1-2, Jan. 1989, p. 198-200.

Astronomy and Astrophysics

Astrophysics

8

Dwarf Stars, Flare Stars, Iue, M Stars, Chromosphere, High Resolution, Late Stars, Stellar Atmospheres

Scientific paper

The first high resolution IUE observations of the classical M dwarf flare star, AD Leonis is reported. For the Mg II h and k emission lines (2795 and 2803 A), no variation in the line strength, width, or flux is found in four spectra spanning 24 hr. The lines are broader in AD Leo than in AT Microscopii and AU Microscopii, the only other M dwarfs to have been observed in high dispersion by IUE. The line widths appear to support a 5 mag linear extension of the Mg II Wilson-Bappu relation, recently calibrated for brighter stars, to low luminosity dwarfs.

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