吸积盘的空间结构
天体物理学
2009-11-13 v1
摘要
基于对双像引力透镜 HE1104-1805 在 0.4 至 8 微米波段观测到的微引力透镜光变,我们测量了类星体吸积盘的尺寸及其随波长变化的结构。将温度建模为幂律形式 T∝R−β,对于采用吸积盘尺寸对数先验的标准模型,我们测得 B 波段(静止系 0.13 微米)的半光半径为 R1/2,B=6.7(+6.2−3.2)×1015 cm (68% CL),对数斜率为 β=0.61(+0.21−0.17)。尺度与斜率均与简单薄盘模型一致,其中对于以 10% 效率在爱丁顿极限辐射的 Shakura-Sunyaev 盘,β=3/4 且 R1/2,B=5.9×1015 cm。观测通量倾向于略平缓的斜率 β=0.55(+0.03−0.02),而对于 β=3/4 则对应显著更小的尺寸。
关键词
引用
@article{arxiv.0707.0003,
title = {The Spatial Structure of An Accretion Disk},
author = {Shawn Poindexter and Nicholas Morgan and Christopher S. Kochanek},
journal= {arXiv preprint arXiv:0707.0003},
year = {2009}
}
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5 pages, 4 figures, submitted to ApJ
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