Transit timing analysis in the HAT-P-32 system
Seeliger, M. and Dimitrov, D. and Kjurkchieva, D. and Mallonn, M. and Fernandez, M. and Kitze, M. and Casanova, V. and Maciejewski, G. and Ohlert, J. M. and Schmidt, J. G. and Pannicke, A. and Puchalski, D. and Göğüş, Ersin and Güver, T. and Bilir, S. and Ak, T. and Hohle, M. M. and Schmidt, T. O. B. and Errmann, R. and Jensen, E. and Cohen, D. and Marschall, L. and Saral, G. and Bernt, I. and Derman, E. and Galan, C. and Neuhaeuser, R. (2014) Transit timing analysis in the HAT-P-32 system. Monthly Notices of the Royal Astronomical Society, 441 (1). pp. 304-315. ISSN 0035-8711 (Print) 1365-2966 (Online)
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Official URL: http://dx.doi.org/10.1093/mnras/stu567
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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