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1篇 您的检索式:作者名="Devesh P.Sanya"
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1Non-sinusoidal transit timing variations for the exoplanet HAT-P-12b显示文摘Considering the importance of investigating the transit timing variations(TTVs)of transiting exoplanets,we present a follow-up study of HAT-P-12 b.We include six new light curves observed between2011 and 2015 from three different observatories,in association with 25 light curves taken from the published literature.The sample of the data used thus covers a time span of~10.2 years with a large coverage of epochs(1160)for the transiting events of the exoplanet HAT-P-12 b.The light curves are utilized to determine the orbital parameters and conduct an investigation of possible TTVs.The new linear ephemeris shows a large value of reducedχ^(2),i.e.X_(red)^(2)(23)=7.93,and the sinusoidal fitting using the prominent frequency coming from a periodogram shows a reducedχ^(2) around 4.Based on these values and the corresponding O-C diagrams,we suspect the presence of a possible non-sinusoidal TTV in this planetary system.Finally,we find that a scenario with an additional non-transiting exoplanet could explain this TTV with an even smaller reducedχ^(2) value of around 2.Devesh P.Sanya Ing-Guey Jiang Li-Hsin Su Li-Chin Yeh Tze-En Chang V.V.Moskvin A.A.Shlyapnikov V.Ignatov David Mkrtichian Evgeny Griv Vineet Kumar Mannaday Parijat Thakur D.K.Sahu Swadesh Chand D.Bisht Zhao Sun Jianghui Ji 2021Research in Astronomy and Astrophysics2021,21,4:0
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