Planet searches using the radial velocity technique show a paucity of companions to solar-type stars within \sim 5 AU in the mass range of \sim 10 - 80 M _ { \text { Jup } } .
This deficit , known as the brown dwarf desert , currently has no conclusive explanation .
New substellar companions in this region help asses the reality of the desert and provide insight to the formation and evolution of these objects .
Here we present 10 new brown dwarf and two low-mass stellar companion candidates around solar-type stars from the Multi-object APO Radial-Velocity Exoplanet Large-Area Survey ( MARVELS ) of the Sloan Digital Sky Survey III ( SDSS-III ) .
These companions were selected from processed MARVELS data using the latest University of Florida Two Dimensional ( UF2D ) pipeline , which shows significant improvement and reduction of systematic errors over previous pipelines .
The 10 brown dwarf companions range in mass from \sim 13 to 76 M _ { \text { Jup } } and have orbital radii of less than 1 AU .
The two stellar companions have minimum masses of \sim 98 and 100 M _ { \text { Jup } } .
The host stars of the MARVELS brown dwarf sample have a mean metallicity of [ Fe/H ] = 0.03 \pm 0.08 dex .
Given our stellar sample we estimate the brown dwarf occurrence rate around solar-type stars with periods less than \sim 300 days to be \sim 0.56 % .