WASP-43b: The closest-orbiting hot Jupiter

Details WASP-43b: The closest-orbiting hot Jupiter WASP-43b: The closest-orbiting hot Jupiter

2011-04-14

arxiv.org/abs/1104.2823v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

4 pages

Scientific paper

We report the discovery of WASP-43b, a hot Jupiter transiting a K7V star every 0.81 d. At 0.6-Msun the host star has the lowest mass of any star hosting a hot Jupiter. It also shows a 15.6-d rotation period. The planet has a mass of 1.8 Mjup, a radius of 0.9 Rjup, and with a semi-major axis of only 0.014 AU has the smallest orbital distance of any known hot Jupiter. The discovery of such a planet around a K7V star shows that planets with apparently short remaining lifetimes owing to tidal decay of the orbit are also found around stars with deep convection zones.

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