Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...410..387f&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 410, no. 1, p. 387-392.
Astronomy and Astrophysics
Astronomy
110
Dwarf Stars, M Stars, Main Sequence Stars, Rosat Mission, Spaceborne Astronomy, Stellar Coronas, Astronomical Catalogs, Light Curve, Sky Surveys (Astronomy), X Ray Astronomy, X Ray Sources
Scientific paper
We present X-ray data, both detections and upper limits, from the ROSAT all-sky survey for most known M dwarfs later than type M5, as well as from selected ROSAT pointed observations of some of these stars. We compare these data with 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. Our 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.
Bookbinder Jay A.
Fleming Thomas Anthony
Giampapa Mark S.
Schmitt Juergen H. M. M.
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