1205.2757 (M. Lendl et al.)

WASP-42 b and WASP-49 b: two new transiting Saturns    [PDF]

M. Lendl, D. R. Anderson, A. Collier-Cameron, A. P. Doyle, M. Gillon, C. Hellier, E. Jehin, T. A. Lister, P. F. L. Maxted, F. Pepe, D. Pollacco, D. Queloz, B. Smalley, D. Segransan, A. M. S. Smith, A. H. M. J. Triaud, S. Udry, R. G. West, P. J. Wheatley

We report the discovery of two new transiting planets from the WASP survey. WASP-42 b is a 0.500 +- 0.035 M_J planet orbiting a K1 star at a separation of 0.0548 +- 0.0017 AU with a period of 4.9816872 +- 0.0000073 days. The radius of WASP-42 is 1.080 +- 0.057 R_J while its equilibrium temperature is T_eq = 995 +- 34 K. We detect some evidence of a small but non-zero eccentricity of e = 0.060 +- 0.013. WASP-49 b is a 0.378 +- 0.027 M_J planet around an old G6 star. It has a period of 2.7817387 +- 5.6 x 10-6 days and a separation of 0.0379 +- 0.0011 AU. This planet is slightly bloated, having a radius of 1.115 +- 0.056 R_J and an equilibrium temperature of T_eq = 1369 +- 42 K. Both planets have been followed up intensively in photometry, in total we have obtained 5 full and one partial transit light curves of WASP-42 and 4 full and one partial light curves of WASP-49 using the Euler-Swiss, TRAPPIST and Faulkes South telescopes.

View original: http://arxiv.org/abs/1205.2757