We report the discovery of WASP-43b, a hot Jupiter transiting a K7V star every 0.81 d. At 0.6-M$_⊙$ the host star has the lowest mass of any star currently known to host a hot Jupiter. It also shows a 15.6-d rotation period. The planet has a mass of 1.8 M$_Jup$, a radius of 0.9 R$_Jup$, 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.
|Journal||Astronomy and Astrophysics|
|Publication status||Published - 1 Nov 2011|
- stars: individual: WASP-43, planetary systems