The rapidly rotating spotted red dwarf flare star Gliese 890

Details The rapidly rotating spotted red dwarf flare star Gliese 890 The rapidly rotating spotted red dwarf flare star Gliese 890

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...183...66p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 183, no. 1, Sept. 1987, p. 66-72.

Astronomy and Astrophysics

Astrophysics

22

Astronomical Photometry, Astronomical Spectroscopy, Flare Stars, Polarimetry, Red Dwarf Stars, Starspots, Stellar Rotation, H Alpha Line, Stellar Evolution, Stellar Luminosity

Scientific paper

The authors present the results of spectroscopic, photometric, and polarimetric observations of the spotted rapidly rotating M-dwarf Gliese 890. Broad spectral lines and starspot modulation of the star's luminosity with a period of 0.4312 days imply a rotational velocity of 70 km s-1 with the rotation axis inclined 60°-90° to the line of sight. Flare activity is reported for the first time on this dM1.5e red dwarf. The authors discuss briefly some scenarios to explain why this spotted flare star rotates so unusually rapidly.

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