2011/03/07 by G. Maciejewski, Maciejewski, G., Martin Seeliger +10
Physics and Astronomy · #Astro and Planetary Science #Astronomy and Astrophysical Research #Earth and Planetary Astrophysics (astro-ph.EP) #FOS: Physical sciences #Stellar, planetary, and galactic studies #astro-ph.EP
paper · pdf · doi:10.48550/arxiv.1103.1325
Accepted for publication in Acta Astronomica
arxiv created 2011/03/07 · openalex publication_date 2011/03/07 · arxiv updated 2011/03/08 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
Studies of transiting extrasolar planets offer an unique opportunity to get to know the internal structure of those worlds. The transiting exoplanet XO-5 b was found to have an anomalously high Safronov number and surface gravity. Our aim was to refine parameters of this intriguing system and search for signs of transit timing variations. We gathered high-precision light curves of two transits of XO-5 b. Assuming three different limb darkening laws, we found the best-fitting model and redetermined parameters of the system, including planet-to-star radius ratio, impact parameter and central time of transits. Error estimates were derived by the prayer bead method and Monte Carlo simulations. Although system's parameters obtained by us were found to agree with previous studies within one sigma, the planet was found to be notable smaller with the radius of 1.03+0.06-0.05 Jupiter radii. Our results confirm the high Safronov number and surface gravity of the planet. With two new mid-transit times, the ephemeris was refined to BJD(TDB)=(2454485.66842 ± 0.00028) + (4.1877537 ± 0.000017) E. No significant transit timing variation was detected.