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arXiv · 1510.05758

HATS-17b: A Transiting Compact Warm Jupiter in a 16.3 Days Circular Orbit

R. Brahm·A. Jordán·G. Á. Bakos·K. Penev·N. Espinoza·M. Rabus·J. D. Hartman·D. Bayliss·S. Ciceri·G. Zhou·L. Mancini·T. G. Tan·M. de Val-Borro·W. Bhatti·Z. Csubry·J. Bento·T. Henning·B. Schmidt·V. Suc·J. Lázár·I. Papp·P. Sári
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Abstract

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$_{\star}$=1.131 $\pm$ 0.030 M$_{\odot}$, R$_{\star}$=1.091$^{+0.070}_{-0.046}$ R$_{\star}$) 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 $\pm$ 0.056 R$_J$ given its Jupiter-like mass of 1.338 $\pm$ 0.065 M$_J$. 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.

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R. Brahm, A. Jordán, G. Á. Bakos, K. Penev, N. Espinoza, M. Rabus, J. D. Hartman, D. Bayliss, S. Ciceri, G. Zhou, L. Mancini, T. G. Tan, M. de Val-Borro, W. Bhatti, Z. Csubry, J. Bento, T. Henning, B. Schmidt, V. Suc, J. Lázár, I. Papp, P. Sári. 2015-10-20. HATS-17b: A Transiting Compact Warm Jupiter in a 16.3 Days Circular Orbit. https://doi.org/10.3847/0004-6256%2F151%2F4%2F89

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