M Dwarfs from Hubble Space Telescope Star Counts. V. The I-Band Luminosity Function
stars: low-mass, brown dwarfs
stars: luminosity function, mass function
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Publisher:American Astronomical Society
Citation:Zheng Zheng et al, "M Dwarfs from Hubble Space Telescope Star Counts. V. The I-Band Luminosity Function," The Astrophysical Journal 601, no. 1 (2004), doi:10.1086/380200
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 M_I ~ 9.5 and drops sharply toward M_I ~ 10.5.