M Dwarfs from Hubble Space Telescope Star Counts. V. The I-Band Luminosity Function
Gould, Andrew; Salim, Samir; Bahcall, John N.; Zheng, Zheng; Flynn, Chris
United States, Finland
Abstract
We derive the disk I-band luminosity function from the Zheng et al. sample of ~1400 disk M dwarfs observed with the Hubble Space Telescope. We adopt a Galactic-height-dependent color-magnitude relation to account for the metallicity gradient above the Galactic plane. The resultant I-band luminosity function peaks at MI~9.5 and drops sharply toward MI~10.5.
Based on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555.