We report the discovery by the HATSouth survey of HATS-4b, an extrasolar planet transiting a V=13.46 mag G star. HATS-4b has a period of P = 2.5167 d, mass of Mp = 1.32 Mj, radius of Rp = 1.02 Rj and density of rho_p = 1.55 +- 0.16 g/cm^3 ~ 1.24 rhoj. The host star has a mass of 1.00 Msun, a radius of 0.92 Rsun and a very high metallicity [Fe/H]= 0.43 +- 0.08. HATS-4b is among the densest known planets with masses between 1-2 Mj and is thus likely to have a significant content of heavy elements of the order of 75 Mearth. In this paper we present the data reduction, radial velocity measurement and stellar classification techniques adopted by the HATSouth survey for the CORALIE spectrograph. We also detail a technique to estimate simultaneously vsini and macroturbulence using high resolution spectra.
@article{arxiv.1402.6546,
title = {HATS-4b: A Dense Hot-Jupiter Transiting a Super Metal-Rich G Star},
author = {A. Jordán and R. Brahm and G. Á. Bakos and D. Bayliss and K. Penev and J. D. Hartman and G. Zhou and L. Mancini and M. Mohler-Fischer and S. Ciceri and B. Sato and Z. Csubry and M. Rabus and V. Suc and N. Espinoza and W. Bhatti and M. de Val-Borro and L. Buchhave and B. Csák and T. Henning and B. Schmidt and T. G. Tan and R. W. Noyes and B. Béky and R. P. Butler and S. Shectman and J. Crane and I. Thompson and A. Williams and R. Martin and C. Contreras and J. Lázár and I. Papp and P. Sári},
journal= {arXiv preprint arXiv:1402.6546},
year = {2015}
}