The Pan-Pacific Planet Search. I. A Giant Planet Orbiting 7 CMa

Abstract

We introduce the Pan-Pacific Planet Search, a survey of 170 metal-rich Southern hemisphere subgiants using the 3.9m Anglo-Australian Telescope. We report the first discovery from this program, a giant planet orbiting 7 CMa (HD 47205) with a period of 763+/-17 days, eccentricity e=0.14+/-0.06, and m sin i=2.6+/-0.6 M_jup. The host star is a K giant with a mass of 1.5+/-0.3 M_sun and metallicity [Fe/H]=0.21+/-0.10. The mass and period of 7 CMa b are typical of planets which have been found to orbit intermediate-mass stars (M*>1.3 M_sun). Hipparcos photometry shows this star to be stable to 0.0004 mag on the radial-velocity period, giving confidence that this signal can be attributed to reflex motion caused by an orbiting planet.

Accepted for publication in ApJ

References in corpus (22)

• Giant Planet Occurrence in the Stellar Mass-Metallicity Plane
• The Occurrence and Mass Distribution of Close-in Super-Earths, Neptunes, and Jupiters
• Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Southern Sample
• Basic physical parameters of a selected sample of evolved stars
• The Exoplanet Orbit Database
• Structure and Evolution of Nearby Stars with Planets II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog
• Retired A Stars and Their Companions: Exoplanets Orbiting Three Intermediate-Mass Subgiants
• Exploring The Frequency Of Close-In Jovian Planets Around M Dwarfs
• Precise radial velocities of giant stars. III. Spectroscopic stellar parameters
• Evolved stars hint to an external origin of enhanced metallicity in planet-hosting stars
• An Eccentric Hot Jupiter Orbiting the Subgiant HD 185269
• Retired A Stars and Their Companions VI. A Pair of Interacting Exoplanet Pairs Around the Subgiants 24 Sextanis and HD200964
• A hot Jupiter orbiting the 1.7 Msun Subgiant HD102956
• A Search for Multi-Planet Systems Using the Hobby-Eberly Telescope
• Precise radial velocities of giant stars: I. Stable stars
• A Planetary System Around HD 155358: The Lowest Metallicity Planet Host Star
• Precise radial velocities of giant stars. IV. A correlation between surface gravity and radial velocity variation and a statistical investigation of companion properties
• The Frequency of Low-Mass Exoplanets. III. Toward eta-Earth at Short Periods
• Discovery of a planet around the K giant star 4 UMa
• A Planet in a 0.6-AU Orbit Around the K0 Giant HD 102272
• The N2K Consortium VI: Doppler Shifts Without Templates and Three New Short-Period Planets
• Stellar Parameters and Chemical Abundances of G Giants

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• Precise radial velocities of giant stars VIII. Testing for the presence of planets with CRIRES Infrared Radial Velocities
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