Analysis of the exoplanet containing system Kepler-13


Budding E., PÜSKÜLLÜ Ç. , Rhodes M. D.

ASTROPHYSICS AND SPACE SCIENCE, cilt.363, 2018 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 363 Konu: 3
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1007/s10509-018-3275-4
  • Dergi Adı: ASTROPHYSICS AND SPACE SCIENCE

Özet

We have applied the close binary system analysis program WINFITTER, with its physically detailed fitting function, to an intensive study of the complex multiple system Kepler-13 using photometry data from all 13 short cadence quarters downloaded from the NASA Exoplanet Archive (NEA) (http://exoplanetarchive.ipac.caltech.edu ). The data-point error of our normalized, phase-sequenced and binned (380 points per bin: 0.00025 phase interval) flux values, at 14 ppm, allows the model's specification for the mean reference flux level of the system to a precision better than 1 ppm. Our photometrically derived values for the mass and radius of KOI13.01 are 6.8 +/- 0.6 M-J and 1.44 +/- 0.04 R-J. The star has a radius of 1.67 +/- 0.05 R-circle dot. Our modelling sets the mean of the orbital inclination i at 94.35 +/- 0.14 degrees, with the star's mean precession angle phi(p) -49.1 +/- 5.0 degrees and obliquity theta(o) 67.9 +/- 3.0 degrees, though there are known ambiguities about the sense in which such angles are measured.