WASP-26b: A 1-Jupiter-mass planet around an early-G-type star
B. Smalley (Keele University), D.R. Anderson, A. Collier Cameron, M., Gillon, C. Hellier, T.A. Lister, P.F.L. Maxted, D. Queloz, A.H.M.J. Triaud,, R.G. West, S.J. Bentley, B. Enoch, F. Pepe, D.L. Pollacco, D. Segransan,, A.M.S. Smith, J. Southworth, S. Udry, P.J. Wheatley
TL;DR
This paper reports the discovery and characterization of WASP-26b, a Jupiter-mass exoplanet transiting an early-G star, with detailed measurements of the planet's and host star's properties, and evidence of a stellar companion.
Contribution
First detailed characterization of WASP-26b, including its mass, radius, and host star properties, and identification of a common-proper motion stellar companion.
Findings
WASP-26b has a mass of 1.02 +/- 0.03 M_Jup and radius of 1.32 +/- 0.08 R_Jup.
The host star is an early-G type with a mass of 1.12 +/- 0.03 M_sun.
The system is at least a common-proper motion pair at about 250 pc distance.
Abstract
We report the discovery of WASP-26b, a moderately over-sized Jupiter-mass exoplanet transiting its 11.3-magnitude early-G-type host star (1SWASP J001824.70-151602.3; TYC 5839-876-1) every 2.7566 days. A simultaneous fit to transit photometry and radial-velocity measurements yields a planetary mass of 1.02 +/- 0.03 M_Jup and radius of 1.32 +/- 0.08 R_Jup. The host star, WASP-26, has a mass of 1.12 +/- 0.03 M_sun and a radius of 1.34 +/- 0.06 R_sun and is in a visual double with a fainter K-type star. The two stars are at least a common-proper motion pair with a common distance of around 250 +/- 15 pc and an age of 6 +/- 2 Gy.
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