Radio constraints on the volume filling factors of AGN winds

Radio constraints on the volume filling factors of AGN winds
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AGN 风体积填充因子的无线电约束

DOI:
10.1111/j.1365-2966.2009.14856.x
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发表时间:
2009
影响因子:
4.8
通讯作者:
Blustin A
Blustin A
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Blustin A

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计算活动星系核(AGN)风的质量外流率对于理解这种风在活动星系核-星系反馈过程中的作用具有重要意义。然而,由于风的体积填充因子是未知的,因此很难估计质量流出率。在本文中,我们使用所观察到的无线电发射的约束条件,以获得上限的风分量在某些附近的活动星系核的体积填充因子。我们这样做是通过预测的1.4 GHz的无线电通量密度发射的这些组件,假设一个均匀的风,然后比较这些与观测到的通量密度为每个活动星系核在这个频率。我们发现体积填充因子的上限在10−4-0.5之间。
The calculation of mass outflow rates of active galactic nuclei (AGN) winds is of great importance in understanding the role that such winds play in AGN–galaxy feedback processes. The mass outflow rates are, however, difficult to estimate since the volume filling factors of the winds are unknown. In this paper, we use constraints imposed by the observed radio emission to obtain upper limits to the volume filling factors of wind components in certain nearby AGN. We do this by predicting the 1.4 GHz radio flux densities emitted by those components, assuming a uniform wind, and then comparing these with the observed flux densities for each AGN at this frequency. We find that the upper limits to the volume filling factors are in the range of 10−4–0.5.
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