WASP-26b: a 1-Jupiter-mass planet around an early-G-type star

摘要

We report the discovery of WASP-26b, a moderately over-sizedJupiter-mass exoplanet transiting its 11.3-mag early-G-type host star(1SWASPJ001824.70-151602.3; TYC 5839-876-1) every 2.7566days. A simultaneousfit to transit photometry and radial-velocity measurements yields a planetarymass of and radius of .The host star, WASP-26, has a mass of and aradius of and is in a visual double with a fainterK-type star. The two stars are at least a common-proper motion pair with acommon distance of around pc and an age of Gy.Key words: planets and satellites: general -stars: individual: WASP-26 -binaries: visual -techniques: photometric - techniques: spectroscopic-techniques: radial velocities