Journal
ASTRONOMY & ASTROPHYSICS
Volume 375, Issue 2, Pages L27-L30Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20010853
Keywords
techniques : radial velocities; stars : individuals : HD 80606; stars : individuals : HD 80607; binaries : visual; extrasolar planets
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We report the detection of a planetary companion orbiting the solar-type star HD80606, the brighter component of a wide binary with a projected separation of about 2000 AU. Using high-signal spectroscopic observations of the two components of the visual binary, we show that they are nearly identical. The planet has an orbital period of 111.8 days and a minimum mass of 3.9 M-Jup. With e = 0.927, this planet has the highest orbital eccentricity among the extrasolar planets detected so far. We finally list several processes this extreme eccentricity could result from.
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