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




Wittenmyer, Robert A.
Endl, Michael
Wang, Lifan
Johnson, John A.
Tinney, C. G.
O'Toole, S. J.

Journal Title

Journal ISSN

Volume Title



We introduce the Pan-Pacific Planet Search, a survey of 170 metal-rich Southern Hemisphere subgiants using the 3.9 m 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 msin i = 2.6 +/- 0.6 M(Jup). The host star is a K giant with a mass of 1.5 +/- 0.3M(circle dot) 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(*) > 1.3M(circle dot)). 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.


LCSH Subject Headings


Wittenmyer, Robert A., Michael Endl, Liang Wang, John Asher Johnson, C. G. Tinney, and S. J. O'Toole. "The Pan-Pacific Planet Search. I. A Giant Planet Orbiting 7 CMa." The Astrophysical Journal, Vol. 743, No. 2 (Dec., 2011): 184.