Published January 1, 2014
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Transit timing analysis in the HAT-P-32 system
Creators
- 1. Univ Shumen, Shumen 9700, Bulgaria
- 2. Leibnitz Inst Astrophys Potsdam, D-14482 Potsdam, Germany
- 3. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain
- 4. N Copernicus Univ, Ctr Astron, Fac Phys Astron & Informat, PL-87100 Torun, Poland
- 5. Sabanci Univ, TR-34956 Istanbul, Turkey
- 6. Istanbul Univ, Dept Astron & Space Sci, Fac Sci, TR-34119 Istanbul, Turkey
- 7. Swarthmore Coll, Dept Phys & Astron, Swarthmore, PA 19081 USA
Description
We present the results of 45 transit observations obtained for the transiting exoplanet HATP-32b. The transits have been observed using several telescopes mainly throughout the YETI (Young Exoplanet Transit Initiative) network. In 25 cases, complete transit light curves with a timing precision better than 1.4 min have been obtained. These light curves have been used to refine the system properties, namely inclination i, planet-to-star radius ratio R-p/R-s, and the ratio between the semimajor axis and the stellar radius a/R-s. First analyses by Hartman et al. suggests the existence of a second planet in the system, thus we tried to find an additional body using the transit timing variation (TTV) technique. Taking also the literature data points into account, we can explain all mid-transit times by refining the linear ephemeris by 21 ms. Thus, we can exclude TTV amplitudes of more than similar to 1.5min.
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