Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...331..958f&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 331, Aug. 15, 1988, p. 958-973. Previously announced in STAR as N88-13188.
Astronomy and Astrophysics
Astrophysics
68
Dwarf Stars, Emission Spectra, M Stars, Stellar Luminosity, Stellar Spectra, Chromosphere, Heating, Line Spectra, X Rays
Scientific paper
A complete sample of X-ray selected M dwarfs are presented which were serendipitously detected in the extended Einstein Observatory Medium Sensitivity Survey (MSS). The MSS detected only early M dwarfs (type MO through M5), 84 percent of which were emission stars (i.e., type Me V). It was calculated that the X-ray luminosity function for early M dwarfs with a log Lx greater than 27.6 and, by comparison to optical luminosity functions, find that about 25 percent of all early M dwarfs emit X-rays at a level greater than log Lx = 27.6. This result is compared to luminosity function estimates from optically selected samples and discussed in light of the sample's kinematic and mean age. Also presented is H alpha and Ca II K line fluxes for each member of the sample and it is shown that the surface H alpha and Ca II K luminosities do indeed correlate with Lx. The significance of this effect to theories of chromospheric and coronal heating is explained.
Fleming Thomas Anthony
Gioia Isabella Maria
Liebert James
Maccacaro Tommaso
No associations
LandOfFree
M dwarfs from the Einstein extended medium sensitivity survey does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with M dwarfs from the Einstein extended medium sensitivity survey, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and M dwarfs from the Einstein extended medium sensitivity survey will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1693675