Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 441, Issue 1, Pages 304-315Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stu567
Keywords
planets and satellites: individual: HAT-P-32b; stars: individual: HAT-P-32; planetary systems
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Funding
- Deutsche Forschungsgemeinschaft (DFG), Collaborative Research Center Sonderforschungsbereich SFB TR 7 'Gravitationswellenastronomie'
- DFG, Priority Programme SPP 1385 on the First ten Million years of the Solar system [NE 515/34-1, NE 515/34-2]
- Polish Ministry of Science and Higher Education [IP2011 031971]
- Thuringian government [B 515-07010]
- Bulgarian Scientific Foundation [DO 02-362, DO 02-85, DDVU 02/40-2010]
- Shumen University [RD-08-261]
- TUBITAK National Observatory (TUG) [12BT100-324-0]
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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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