Accretion disk models for optical and ultraviolet microvariability in active galactic nuclei
Accretion disk models for optical and ultraviolet microvariability in active galactic nuclei
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DOI：
10.1086/172453
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发表时间：
1993-04
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影响因子：
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通讯作者：
A. Mangalam;P. Wiita
中科院分区：
文献类型：
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作者：
A. Mangalam;P. Wiita
我们通过吸积盘上的不对称现象描述了agn中快速、低幅度的紫外线和光学变化的情景，这可以代表由磁、引力和其他不稳定性引起的扰动。我们对更常见的α-圆盘进行了模拟，其中粘性剪切t rφ与总压力成正比，以及对β-圆盘的几何形状进行了模拟，其中剪切仅与气体压力成正比；考虑了耀斑特性和圆盘结构的一系列参数
We describe scenarios for rapid, low-amplitude UV and optical variability in AGNs through phenomenologically modeled asymmetries on accretion disks, which can represent perturbations arising from magnetic, gravitational, and other instabilities. The simulations were done for both the more familiar α-disks, where the viscous shear, t rφ , is proportional to the total pressure, as well as for the β-disk geometry, where the shear is proportional to only the gas pressure; a range of parameters for flare properties and disk structures were considered