THE PAN-PACIFIC PLANET SEARCH. I. A GIANT PLANET ORBITING 7 CMa

Journal Article · Tue Dec 20 04:00:00 EST 2011 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/743/2/184· OSTI ID:22004428

Wittenmyer, Robert A; Tinney, C G ^[1]; Endl, Michael ^[2]; Liang, Wang ^[3]; Johnson, John Asher ^[4]

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1. Department of Astrophysics, School of Physics, University of New South Wales, NSW 2052 (Australia)
2. McDonald Observatory, University of Texas at Austin, 1 University Station C1400, Austin, TX 78712 (United States)
3. Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang District, Beijing 100012 (China)
4. Department of Astrophysics, California Institute of Technology, MC 249-17, Pasadena, CA 91125 (United States)

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{sub Jup}. The host star is a K giant with a mass of 1.5 {+-} 0.3 M{sub 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{sub *} > 1.3 M{sub 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.

• OSTI ID: 22004428
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 2 Vol. 743; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
MASS
METALS
PHOTOMETRY
RADIAL VELOCITY
SOUTHERN HEMISPHERE
STARS
TELESCOPES