發(fā)布時間：2018-08-14 17:41

【摘要】：使用紫金山天文臺盱眙觀測站近地天體望遠(yuǎn)鏡對WASP-43 b和TrES-3 b分別做了2次和4次凌星主食的測光后續(xù)觀測.經(jīng)過較差測光和光變曲線擬合,分別得到了兩個系統(tǒng)的相關(guān)物理參數(shù),結(jié)果與之前的文獻(xiàn)結(jié)果吻合.結(jié)合多篇文獻(xiàn)中的數(shù)據(jù),對兩個系統(tǒng)凌星中心時刻的觀測殘差O-C分別作了線性和二次函數(shù)擬合,根據(jù)線性擬合得到了行星的軌道周期及凌星中心時刻變化即TTV,分析后認(rèn)為在兩個系統(tǒng)中尚未發(fā)現(xiàn)明顯的周期性TTV信號,并給出了WASP-43和TrES-3系統(tǒng)中1:2軌道共振位置上可能存在行星的質(zhì)量上限分別為1.826和1.504個地球質(zhì)量.通過二次函數(shù)擬合,尚未發(fā)現(xiàn)TrES-3b存在長期TTV即軌道衰變;證認(rèn)了WASP-43 b可能存在軌道衰變,得到其軌道衰變率P=(-0.005248±0.001714)s·yr~(-1),并與文獻(xiàn)中的相關(guān)結(jié)果做了比較,還據(jù)此計算出了該系統(tǒng)的恒星潮汐質(zhì)量參數(shù)下限為Q_*~'≥1.5×10~5,并分別對兩個系統(tǒng)中不同的Q_*~'值給出了相應(yīng)的行星剩余壽命.
[Abstract]:The near-Earth object telescope of Xuyi Observatory of Zijinshan Observatory has been used to observe WASP-43 b and TrES-3 b twice and 4 times respectively. The physical parameters of the two systems are obtained by the fitting of the differential photometry and the photovariation curve, and the results are in agreement with the previous literatures. Based on the data in many literatures, the linear and quadratic function fitting of the observed residual O-C of the central moments of the two systems is made. According to the linear fitting, the orbital period of the planet and the change of the central moment of the Lexus are obtained. It is concluded that no obvious periodic TTV signals have been found in the two systems. The upper mass limits of the possible planets at the resonance position of 1:2 orbit in the WASP-43 and TrES-3 systems are 1.826 and 1.504 respectively. By quadratic function fitting, it has not been found that there is a long term TTV that is orbital decay in TrES-3b, and the orbital decay rate P = (-0.005248 鹵0.001714) s ~ (-1) of WASP-43 b may exist, and the results are compared with those in literature. Based on this, the lower limit of the mass parameters of the stellar tides is calculated to be Q _ T '鈮，

本文編號：2183617