55 Cancri: stellar astrophysical parameters, a planet in the habitable zone, and implications for the radius of a transiting super-earth

@article{Braun201155CS,
  title={55 Cancri: stellar astrophysical parameters, a planet in the habitable zone, and implications for the radius of a transiting super-earth},
  author={Kaspar von Braun and Tabetha S. Boyajian and Theo A. ten Brummelaar and Stephen R. Kane and Gerard T. van Belle and David R. Ciardi and Sean N. Raymond and Mercedes L{\'o}pez-Morales and Harold A. Mcalister and Gail H. Schaefer and Stephen T. Ridgway and Laszlo Sturmann and Judit Sturmann and Russel J. White and Nils H. Turner and Christopher D. Farrington and Peter M. Garnavich Sirtf Science Center - Caltech and U GeorgiaState and Hubble Fellow and Eső and CSIC-IEEC and Char{\'a} and Noao and CarnegieDTM and Universit'e de Bordeaux and Laboratoire d'astrophysique de Bordeaux},
  journal={The Astrophysical Journal},
  year={2011},
  volume={740},
  pages={49}
}
The bright star 55 Cancri is known to host five planets, including a transiting super-Earth. The study presented here yields directly determined values for 55 Cnc's stellar astrophysical parameters based on improved interferometry: R = 0.943 ± 0.010 R_☉, T EFF = 5196 ± 24 K. We use isochrone fitting to determine 55 Cnc's age to be 10.2 ± 2.5 Gyr, implying a stellar mass of 0.905 ± 0.015 M_☉. Our analysis of the location and extent of the system's habitable zone (HZ; 0.67-1.32 AU) shows that… Expand

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