基于暗能量巡天的连续谱反响映射测量类星体吸积盘尺寸
星系天体物理
2018-08-29 v2
摘要
我们基于暗能量巡天（Dark Energy Survey）的 光变曲线，给出了 15 个红移 亮类星体的吸积盘尺寸测量。我们利用两种方法通过连续谱反响映射测量盘尺寸，两种方法均源于吸积盘具有径向温度梯度、且给定半径处的连续谱辐射可用单一黑体很好描述的预期。第一种方法测量多波段光变曲线之间的相对时延，从而得到短波与长波变化之间的相对时间滞后。由此，我们仅能给出盘尺寸的上限约束，因为许多源在 2 水平上与时延为零相符。第二种方法直接拟合标准薄盘的模型参数，而非求解光变曲线之间的各个时间滞后。我们的测量结果与盘在 0.3–1 倍爱丁顿吸积率下由该模型预测的尺寸吻合良好。鉴于较大的不确定性，我们的测量也与强引力透镜类星体的引力微透镜研究以及其他测光反响映射结果（其盘尺寸比预测值大约数倍（3））一致。
引用
@article{arxiv.1711.11588,
title = {Quasar Accretion Disk Sizes From Continuum Reverberation Mapping From the Dark Energy Survey},
author = {D. Mudd and P. Martini and Y. Zu and C. Kochanek and B. Peterson and R. Kessler and T. M. Davis and J. Hoorman and A. King and C. Lidman and N. Sommer and B. E. Tucker and J. Asorey and S. Hinton and K. Glazebrook and K. Kuehn and G. Lewis and E. MaCaulay and A. Moller and C. O'Neill and B. Zhang and T. M. C. Abbott and F. B. Abdalla and S. Allam and M. Banerji and A. Benoit-Levy and E. Bertin and A. Carnero Rosell and D. Carollo and M. Carrasco Kind and J. Carretero and C. E. Cunha and C. B. D'Andrea and L. N. da Costa and C. Davis and S. Desai and P. Doel and P. Fosalba and J. Garcia-Bellido and E. Gaztanaga and D. W. Gerdes and D. Gruen and R. A. Gruendl and J. Gschwend and G. Gutierrez and W. G. Hartley and K. Honscheid and D. J. James and S. Kuhlmann and N. Kuropatkin and M. Lima and M. A. G. Maia and J. L. Marshall and R. G. McMahon and F. Menanteau and R. Miquel and A. A. Plazas and A. K. Romer and E. Sanchez and R. Schindler and M. Schubnell and M. Smith and R. C. Smith and M. Soares-Santos and F. Sobreira and E. Suchyta and M. E. C. Swanson and G. Tarle and D. Thomas and D. L. Tucker and A. R. Walker and The DES Collaboration},
journal= {arXiv preprint arXiv:1711.11588},
year = {2018}
}
备注
Accepted by ApJ, comments still welcome!