We report on the discovery of WASP-37b, a transiting hot Jupiter orbiting a mv = 12.7 G2-type dwarf, with a period of 3.577471 \pm 0.00001 d, transit epoch T0 = 2455338.6188 \pm 0.0006 (HJD), and a transit duration 0.1304 \pm 0.0018 d. The planetary companion has a mass Mp = 1.80 \pm 0.17 MJ and radius Rp = 1.16 \pm 0.07 RJ, yielding a mean density of 1.15 \pm 0.15 times that of Jupiter. From a spectral analysis and comparisons with stellar models, we find the host star has M* = 0.925 \pm 0.120 Msun, R* = 1.003 \pm 0.053 Rsun, Teff = 5800 \pm 150 K and [Fe/H] = -0.40 \pm 0.12. WASP-37 is therefore one of the lowest metallicity stars to host a transiting planet.
@article{arxiv.1008.3096,
title = {WASP-37b: a 1.8 MJ exoplanet transiting a metal-poor star},
author = {E. K. Simpson and F. Faedi and S. C. C. Barros and D. J. A. Brown and A. Collier Cameron and L. Hebb and D. Pollacco and B. Smalley and I. Todd and O. W. Butters and G. Hebrard and J. McCormac and G. R. M. Miller and A. Santerne and R. A. Street and I. Skillen and A. H. M. J. Triaud and D. R. Anderson and J. Bento and I. Boisse and F. Bouchy and B. Enoch and C. A. Haswell and C. Hellier and S. Holmes and K. Horne and F. P. Keenan and T. A. Lister and P. F. L. Maxted and V. Moulds and C. Moutou and A. J. Norton and N. Parley and F. Pepe and D. Queloz and D. Segransan and A. M. S. Smith and H. C. Stempels and S. Udry and C. A. Watson and R. G. West and P. J. Wheatley},
journal= {arXiv preprint arXiv:1008.3096},
year = {2015}
}