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

作　　者：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 

机构地区：[1]Department of Physics and Institute of Astronomy,“National Tsing-Hua University”,HsinChu 30013,China [2]Institute of Computational and Modeling Science,“National Tsing-Hua University”,HsinChu 30013,China [3]Crimean Astrophysical Observatory,298409,Nauchny,Crimea [4]National Astronomical Research Institute of Thailand(NARIT),Siripanich Building,191 Huaykaew Road,Muang District,Chiangmai,Thailand [5]Department of Physics,Ben-Gurion University,Beer-Sheva 84105,Israel [6]Department of Pure&Applied Physics,Guru Ghasidas Vishwavidyalaya(A Central University),Bilaspur(C.G.)-495009,India [7]Indian Institute of Astrophysics,Bangalore 560034,India [8]Key Laboratory for Researches in Galaxies and Cosmology,University of Science and Technology of China,Chinese Academy of Sciences [9]Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210008,China

出　　处：《Research in Astronomy and Astrophysics》2021年第4期253-263,共11页天文和天体物理学研究（英文版）

基　　金：supported by grants from the Ministry of Science and Technology(MOST),Taiwan,China.The grant numbers are MOST 105-2119-M-007-029-MY3,MOST 1062112-M-007-006-MY3;the University Grants Commission(UGC);financial support through Major Research Project no.UGC-MRP 43-521/2014(SR);IUCCA,Pune,India for providing supports through the IUCCA Associateship Programme;financially supported by the National Natural Science Foundation of China(Grant Nos.11590782 and 11421303);supported by the B-type Strategic Priority Program of the Chinese Academy of Sciences(Grant No.XDB41000000);the National Natural Science Foundation of China(Grant No.11773081);CAS Interdisciplinary Innovation Team;Foundation of Minor Planets of the Purple Mountain Observatory。

摘　　要：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.

关 键 词：planetary systems techniques PHOTOMETRIC 

分 类 号：P15[天文地球—天文学]