HD 80606 b, a planet on an extremely elongated orbit

Details HD 80606 b, a planet on an extremely elongated orbit HD 80606 b, a planet on an extremely elongated orbit

2001-06-14

arxiv.org/abs/astro-ph/0106256v2

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure included, submitted to A&A, final version

Scientific paper

10.1051/0004-6361:20010853

We report the detection of a planetary companion orbiting the solar-type star HD 80606, 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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