WASP-40b: independent discovery of the 0.6-Mjup transiting exoplanet HAT-P-27b

D. R. Anderson; S. C. C. Barros; I. Boisse; F. Bouchy; A. Collier-Cameron; F. Faedi; G. Hebrard; C. Hellier; M. Lendl; C. Moutou; D. Pollacco; A. Santerne; B. Smalley; A. M. S. Smith; I. Todd; A. H. M. J. Triaud; R. G. West; P. J. Wheatley; J. Bento; B. Enoch; M. Gillon; P. F. L. Maxted; J. McCormac; D. Queloz; E. K. Simpson; I. Skillen

doi:10.1086/660135

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arXiv · 1101.4643

WASP-40b: independent discovery of the 0.6-Mjup transiting exoplanet HAT-P-27b

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Abstract

From WASP photometry and SOPHIE radial velocities we report the discovery of WASP-40b (HAT-P-27b), a 0.6 Mjup planet that transits its 12th magnitude host star every 3.04 days. The host star is of late G-type or early K-type and likely has a metallicity greater than solar ([Fe/H] = 0.14 +/- 0.11). The planet's mass and radius are typical of the known hot Jupiters, thus adding another system to the apparent pileup of transiting planets with periods near 3 to 4 days. Our parameters match those of the recent HATnet announcement of the same planet, thus giving confidence in the techniques used. We report a possible indication of stellar activity in the host star.

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D. R. Anderson, S. C. C. Barros, I. Boisse, F. Bouchy, A. Collier-Cameron, F. Faedi, G. Hebrard, C. Hellier, M. Lendl, C. Moutou, D. Pollacco, A. Santerne, B. Smalley, A. M. S. Smith, I. Todd, A. H. M. J. Triaud, R. G. West, P. J. Wheatley, J. Bento, B. Enoch, M. Gillon, P. F. L. Maxted, J. McCormac, D. Queloz, E. K. Simpson, I. Skillen. 2011-05-11. WASP-40b: independent discovery of the 0.6-Mjup transiting exoplanet HAT-P-27b. https://doi.org/10.1086/660135

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