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    A Four-Planet System Orbiting The K0V Star HD 141399

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    2014_06_hd141399.pdf (9.798Mb)
    Date
    2014-06
    Author
    Vogt, Steven S.
    Butler, R. Paul
    Rivera, Eugenio J.
    Kibrick, Robert
    Burt, Jennifer
    Hanson, Russell
    Meschiari, Stefano
    Henry, Gregory W.
    Laughlin, Gregory
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    Abstract
    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 0.69M(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.
    Department
    McDonald Observatory
    Subject
    planetary systems
    planets and satellites: detection
    stars: individual
    (hd 141399)
    techniques: radial velocities
    sun-like star
    super-earth
    extrasolar planets
    habitable zone
    transiting planet
    short-period
    55 cancri
    mass
    search
    photometry
    astronomy & astrophysics
    URI
    http://hdl.handle.net/2152/34997
    xmlui.dri2xhtml.METS-1.0.item-citation
    Vogt, Steven S., R. Paul Butler, Eugenio J. Rivera, Robert Kibrick, Jennifer Burt, Russell Hanson, Stefano Meschiari, Gregory W. Henry, and Gregory Laughlin. "A Four-planet System Orbiting The K0V Star HD 141399." The Astrophysical Journal, Vol. 787, No. 2 (Jun., 2014): 97.
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    • facebook
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