Sub-Saturn Planetary Candidates of HD 16141 and HD 46375
Abstract
Precision Doppler measurements from the Keck High-Resolution Echelle Spectrograph reveal periodic Keplerian velocity variations in the stars HD 16141 and HD 46375. HD 16141 (G5 IV) has a period of 75.8 days and a velocity amplitude of 11 m s-1, yielding a companion having Msini=0.22 MJUP and a semimajor axis of a=0.35 AU. HD 46375 (K1 IV-V) has a period of 3.024 days and a velocity amplitude of 35 m s-1, yielding a companion with Msini=0.25 MJUP, 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. Based on observations obtained at the W. M. Keck Observatory, which is operated jointly by the University of California and the California Institute of Technology.
- Publication:
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The Astrophysical Journal
- Pub Date:
- June 2000
- DOI:
- 10.1086/312723
- arXiv:
- arXiv:astro-ph/0004326
- Bibcode:
- 2000ApJ...536L..43M
- Keywords:
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- Stars: Planetary Systems;
- Stars: Individual: Henry Draper Number: HD 16141;
- Stars: Individual: Henry Draper Number: HD 46375;
- Astrophysics
- E-Print:
- 4 Figures