Fundamental Parameters of the Exoplanet Host K Giant Star iota Draconis from the CHARA Array

Details Fundamental Parameters of the Exoplanet Host K Giant Star iota Draconis from the CHARA Array Fundamental Parameters of the Exoplanet Host K Giant Star iota Draconis from the CHARA Array

2011-09-22

arxiv.org/abs/1109.4950v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Accepted to the Astrophysical Journal. arXiv admin note: substantial text overlap with arXiv:1103.2742

Scientific paper

We measured the angular diameter of the exoplanet host star iota Dra with Georgia State University's Center for High Angular Resolution Astronomy (CHARA) Array interferometer, and, using the star's parallax and photometry from the literature, calculated its physical radius and effective temperature. We then combined our results with stellar oscillation frequencies from Zechmeister et al. (2008) and orbital elements from Kane et al. (2010) to determine the masses for the star and exoplanet. Our value for the central star's mass is 1.82 +/- 0.23 M_Sun, which means the exoplanet's minimum mass is 12.6 +/- 1.1 M_Jupiter. Using our new effective temperature, we recalculated the habitable zone for the system, though it is well outside the star-planet separation.

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