Transiting planets as a precision clock to constrain the time variation of the gravitational constant

Publications of the Astronomical Society of Japan

Suto, Yasushi¹  Masuda, Kento² 

[1] Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, JapanResearch Center for the Early Universe, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan;Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan

关键词: gravitation;    "planets and satellites: general";    "techniques: photometric";   

DOI  :  10.1093/pasj/psw017

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

Analysisoftransittimesinexoplanetarysystemsaccuratelyprovidesaninstantaneousorbitalperiod,P(t),oftheirmemberplanets.Along-termmonitoringofthosetransitingplanetarysystemsputslimitsonthevariabilityofP(t),whicharetranslatedintotheconstraintsonthetimevariationofthegravitationalconstantG.Weapplythisanalysisto10transitingsystemsobservedbytheKeplerspacecraft,andfindthatΔG/G≲5×10−6for2009–2013,or$$dot{G}/Glesssim10^{-6}:$$yr−1if$$dot{G}$$isconstant.Whilethederivedlimitisweakerthanthosefromotheranalyses,itiscomplementarytothemandcanbeimprovedbyanalyzingnumeroustransitingsystemsthatarecontinuouslymonitored.

【 授权许可】

Unknown