Simultaneous Estimation of Time Delays and Quasar Structure
Simultaneous Estimation of Time Delays and Quasar Structure
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时间延迟和类星体结构的同时估计
DOI：
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发表时间：
2007
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通讯作者：
G. Meylan
中科院分区：
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作者：
C. Morgan;Michael E. Eyler;C. Kochanek;N. Morgan;E. Falco;C. Vuissoz;F. Courbin;G. Meylan
我们扩展了贝叶斯蒙特卡罗方法用于分析引力透镜类星体的光曲线，以同时估计时间延迟和类星体连续发射区域的大小，包括它们之间的相互不确定性。我们将该方法应用于HE1104-1805和QJ0158-4325这两个具有微透镜和内在变异性的双成像类星体。对于HE1104-1805，所得到的时间延迟Δ tAB = tA−tB = 162.2−5.9+6.3天，吸积盘大小估计为log {(rs/cm) [cos (i)/0.5]1/2} = 15.7−0.5+0.4，在0.2 μm的静止帧和倾角i处，与先前的估计一致，但表明现有的估计微透镜存在的时间延迟的方法低估了不确定性。我们无法测量QJ0158-4325的时间延迟，但在其余帧中，吸积盘的大小为log {(rs/cm) [cos (i)/0.5]1/2} = 14.9±0.3，为0.3 μm。
We expand our Bayesian Monte Carlo method for analyzing the light curves of gravitationally lensed quasars to simultaneously estimate time delays and the sizes of quasar continuum emission regions including their mutual uncertainties. We apply the method to HE1104–1805 and QJ0158–4325, two doubly imaged quasars with microlensing and intrinsic variability on comparable timescales. For HE1104–1805 the resulting time delay of Δ tAB = tA − tB = 162.2−5.9+6.3 days and accretion disk size estimate of log {(rs/cm) [cos (i)/0.5]1/2} = 15.7−0.5+0.4 at 0.2 μm in the rest frame and for inclination i are consistent with earlier estimates but suggest that existing methods for estimating time delays in the presence of microlensing underestimate the uncertainties. We are unable to measure a time delay for QJ0158–4325, but the accretion disk size is log {(rs/cm) [cos (i)/0.5]1/2} = 14.9 ± 0.3 at 0.3 μm in the rest frame.