Precision Doppler measurements from the Keck/HIRES spectrometer reveal periodic Keplerian velocity variations in the stars HD 16141 and HD 46375 .
HD 16141 ( G5 IV ) has a period of 75.8 d and a velocity amplitude of 11 m s ^ { -1 } , yielding a companion having M \sin i~ { } = 0.22 M _ { JUP } Â and a semimajor axis , a = 0.35 AU .
HD 46375 ( K1 IV/V ) has a period of 3.024 d and a velocity amplitude of 35 m s ^ { -1 } , yielding a companion with M \sin i~ { } =0.25 M _ { JUP } , a semimajor axis of a = 0.041 AU , and an eccentricity of 0.04 ( consistent with zero ) .
These companions contribute to the rising planet mass function toward lower masses .