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

2011/11/03 by Robert A. Wittenmyer, R. A. Wittenmyer, M. Endl +8 · 2 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #Stellar, planetary, and galactic studies #astro-ph.EP

paper · pdf · doi:10.1088/0004-637x/743/2/184

Accepted for publication in ApJ

arxiv created 2011/11/03 · openalex publication_date 2011/12/02 · arxiv updated 2015/06/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04

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.

Citations

• Structure and Evolution of Nearby Stars with Planets II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog
• Basic physical parameters of a selected sample of evolved stars
• Validation of the new Hipparcos reduction
• Substellar Companions to Evolved Intermediate-Mass Stars: HD 145457 and HD 180314
• Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Southern Sample
• Precise radial velocities of giant stars

Cited by

• A planetary companion around the K giant eps Corona Borealis
• Canis Major [wikipedia]