Stellar coronae at the end of the main sequence: A ROSAT survey of the late M dwarfs

Details Stellar coronae at the end of the main sequence: A ROSAT survey of the late M dwarfs Stellar coronae at the end of the main sequence: A ROSAT survey of the late M dwarfs

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993stin...9419794f&link_type=abstract

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Astronomy and Astrophysics

Astronomy

Dwarf Stars, M Stars, Main Sequence Stars, Rosat Mission, Stellar Coronas, X Ray Astronomy, Sky Surveys (Astronomy), Stellar Luminosity, X Ray Sources

Scientific paper

X-ray data, both detections and upper limits, from the Rosat all sky survey for most known M dwarfs later than type M5 are presented. Selected Rosat pointed observations of some of these stars are included. These data are compared to similar data for early M dwarfs in an attempt to probe the nature of the magnetic dynamo and coronal heating mechanism for the very late M dwarfs, which are presumably totally convective. The results indicate that late M dwarfs can have coronae which are just as active as those for the early M dwarfs and that coronal heating efficiency for 'saturated' stars does not drop at spectral type M6.

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