We report the discovery of HATS-17b, the first transiting warm Jupiter of the HATSouth network. HATS-17b transits its bright (V=12.4) G-type (M⋆=1.131 ± 0.030 M⊙, R⋆=1.091−0.046+0.070 R⋆) metal-rich ([Fe/H]=+0.3 dex) host star in a circular orbit with a period of P=16.2546 days. HATS-17b has a very compact radius of 0.777 ± 0.056 RJ given its Jupiter-like mass of 1.338 ± 0.065 MJ. Up to 50% of the mass of HATS-17b may be composed of heavy elements in order to explain its high density with current models of planetary structure. HATS-17b is the longest period transiting planet discovered to date by a ground-based photometric survey, and is one of the brightest transiting warm Jupiter systems known. The brightness of HATS-17b will allow detailed follow-up observations to characterize the orbital geometry of the system and the atmosphere of the planet.
@article{arxiv.1510.05758,
title = {HATS-17b: A Transiting Compact Warm Jupiter in a 16.3 Days Circular Orbit},
author = {R. Brahm and A. Jordán and G. Á. Bakos and K. Penev and N. Espinoza and M. Rabus and J. D. Hartman and D. Bayliss and S. Ciceri and G. Zhou and L. Mancini and T. G. Tan and M. de Val-Borro and W. Bhatti and Z. Csubry and J. Bento and T. Henning and B. Schmidt and V. Suc and J. Lázár and I. Papp and P. Sári},
journal= {arXiv preprint arXiv:1510.05758},
year = {2016}
}