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We report on a new measurement of the luminosity function (LF) and massfunction (MF) of field low-mass dwarfs using Sloan Digital Sky Survey (SDSS)photometry. The final catalog is composed of ~15 million low-mass stars (0.1Msun < M < 0.8 Msun), spread over 8,400 square degrees. Distances to the starsare estimated using new photometric parallax relations, constructed from ugrizphotometry of nearby low-mass stars with trigonometric parallaxes. The LF ismeasured with a novel technique, which simultaneously measures Galacticstructure and the stellar LF. The resulting LF is compared to previous studiesand converted to a MF. The MF is well-described by a log-normal distribution,with Mo = 0.27 Msun.

Our Nearest 15 Million Neighbors: The Field Low-Mass Stellar Luminosity and Mass Functions