HAT-P-4b: A Metal-rich Low-Density Transiting Hot Jupiter

@article{Kovacs2007HATP4bAM,
  title={HAT-P-4b: A Metal-rich Low-Density Transiting Hot Jupiter},
  author={Gabor Kovacs and G'asp'ar 'A. Bakos and Guillermo Torres and Alessandro Sozzetti and David W. Latham and Robert W. Noyes and R. Paul Butler and Geoffrey W. Marcy and D. A. Fischer and J. M. Fern{\'a}ndez and Gilbert A. Esquerdo and Dimitar D. Sasselov and Robert P. Stefanik and Andr{\'a}s P{\'a}l and J{\'o}zsef L{\'a}z{\'a}r and Istv{\'a}n Papp and P. Sari Konkoly Observatory and Cfa and Hubble Fellow and INAF-Osservatorio Astrofisico di Torino and Department of Terrestrial Magnetism and DC CarnegieInstituteofWashington and Department of Physics Astronomy and University of Southern California and Berkeley Department of PhysicsAstronomy and S. Colafrancesco Dept. of Astronomy and Eotvos Lor'and University and Hungarian Astronomical Association},
  journal={The Astrophysical Journal},
  year={2007},
  volume={670}
}
We describe the discovery of HAT-P-4b, a low-density extrasolar planet transiting BD+36 2593, a V = 11.2mag slightly evolved metal-rich late F star. The planet’s orbital period is 3.056536 ± 0.000057d with a mid-transit epoch of 2,454,245.8154±0.0003 (HJD). Based on high-precision photometric and spectroscopic data, and by using transit light curve modeling, spectrum analysis and evolutionary models, we derive the following planet parameters: Mp= 0.68±0.04MJ, Rp= 1.27±0.05RJ, �p= 0.41±0.06gcm… 

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