M dwarfs from the Einstein extended medium sensitivity survey

摘要: 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 only early (type MO through M5), 84 percent emission stars (i.e., type Me V). It was calculated that luminosity function for with a log Lx greater than 27.6 and, by comparison to optical functions, find about 25 all emit X-rays at level = 27.6. This result is compared estimates from optically samples and discussed light sample's kinematic mean age. Also H alpha Ca II K line fluxes each member it shown surface luminosities do indeed correlate Lx. significance this effect theories chromospheric coronal heating explained. 76 references.