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Title: A four-planet system orbiting the K0V star HD 141399

We present precision radial velocity (RV) data sets from Keck-HIRES and from Lick Observatory's new Automated Planet Finder Telescope and Levy Spectrometer on Mt. Hamilton that reveal a multiple-planet system orbiting the nearby, slightly evolved, K-type star HD 141399. Our 91 observations over 10.5 yr suggest the presence of four planets with orbital periods of 94.35, 202.08, 1070.35, and 3717.35 days and minimum masses of 0.46, 1.36, 1.22, and 0.69 M{sub J} , respectively. The orbital eccentricities of the three inner planets are small, and the phase curves are well sampled. The inner two planets lie just outside the 2:1 resonance, suggesting that the system may have experienced dissipative evolution during the protoplanetary disk phase. The fourth companion is a Jupiter-like planet with a Jupiter-like orbital period. Its orbital eccentricity is consistent with zero, but more data will be required for an accurate eccentricity determination.
Authors:
; ; ; ; ;  [1] ;  [2] ;  [3] ;  [4]
  1. UCO/Lick Observatory, Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States)
  2. Department of Terrestrial Magnetism, Carnegie Institute of Washington, Washington, DC 20015 (United States)
  3. McDonald Observatory, University of Texas at Austin, Austin, TX 78752 (United States)
  4. Center of Excellence in Information Systems, Tennessee State University, Nashville, TN 37209 (United States)
Publication Date:
OSTI Identifier:
22356802
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 787; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; DETECTION; EVOLUTION; JUPITER PLANET; MASS; PROTOPLANETS; RADIAL VELOCITY; RESONANCE; SPECTROMETERS; STARS; TELESCOPES