Non-sinusoidal transit timing variations for the exoplanet HAT-P-12b

Abstract Considering the importance of investigating transit timing variations (TTVs) transiting exoplanets, we present a follow-up study HAT-P-12b. We include six new light curves observed between 2011 and 2015 from three different observatories, in association with 25 taken published literature. The sample data used thus covers time span ∼ 10.2 years large coverage epochs (1160) for events exoplanet are utilized to determine orbital parameters conduct an investigation possible TTVs. linear ephemeris shows value reduced χ 2 , i.e. χ red 2 ( 23 stretchy="false">) = 7.93, sinusoidal fitting using prominent frequency coming periodogram around 4. Based on these values corresponding O – C diagrams, suspect presence non-sinusoidal TTV this planetary system. Finally, find that scenario additional non-transiting could explain even smaller 2.