Portal de Periódicos da CAPES

FUNDAMENTAL PARAMETERS OF THE EXOPLANET HOST K GIANT STAR ι DRACONIS FROM THE CHARA ARRAY

2011; IOP Publishing; Volume: 743; Issue: 2 Linguagem: Inglês

10.1088/0004-637x/743/2/130

1538-4357

Ellyn K. Baines, Harold A. McAlister, Theo A. ten Brummelaar, N. H. Turner, J. Sturmann, L. Sturmann, P. J. Goldfinger, C. Farrington, Stephen T. Ridgway,

Astrophysics and Star Formation Studies

We measured the angular diameter of the exoplanet host star ι Dra with Georgia State University's Center for High Angular Resolution Astronomy 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. and orbital elements from Kane et al. to determine the masses for the star and exoplanet. Our value for the central star's mass is 1.82 ± 0.23 M☉, which means the exoplanet's minimum mass is 12.6 ± 1.1 MJupiter. Using our new effective temperature, we recalculated the habitable zone for the system, though it is well outside the star–planet separation.