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EPIC 228735255b

Title: EPIC 228735255b - An eccentric 6.57 day transiting hot Jupiter in Virgo
Author: H.A.C. Giles, D. Bayliss, N. Espinoza, R. Brahm, S. Blanco-Cuaresma, A. Shporer, D. Armstrong, C. Lovis, S. Udry, F. Bouchy, M. Marmier, A. Jordán, J. Bento, A. Collier Cameron, R. Sefako, W. D. Cochran, F. Rojas, M. Rabus, J.S. Jenkins, M. Jones, B. Pantoja, M. Soto, R. Jensen-Clem, D.A. Duev, M. Salama, R. Riddle, C. Baranec, N.M. Law

We present the discovery of EPIC 228735255b, a P= 6.57 days Jupiter-mass (M_P=1.019±0.070 M_Jup) planet transiting a V=12.5 (G5-spectral type) star in an eccentric orbit (e=0.120^{+0.056}_{-0.046}) detected using a combination of K2 photometry and ground-based observations. With a radius of 1.095±0.018R_Jup the planet has a bulk density of 0.726±0.062 rho_Jup. The host star has a [Fe/H] of 0.12±0.045, and from the K2 light curve we find a rotation period for the star of 16.3±0.1 days. This discovery is the 9th hot Jupiter from K2 and highlights K2's ability to detect transiting giant planets at periods slightly longer than traditional, ground-based surveys. This planet is slightly inflated, but much less than others with similar incident fluxes. These are of interest for investigating the inflation mechanism of hot Jupiters.

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