M Dwarfs from Hubble Space Telescope Star Counts. V. The I-band Luminosity Function

Astronomy and Astrophysics – Astrophysics

Scientific paper

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2 pages, 1 eps figure, submitted to ApJ

Scientific paper

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.

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