Radio constraints on the volume filling factors of AGN winds
Radio constraints on the volume filling factors of AGN winds
复制标题
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
中科院分区:
文献类型:
--
作者:
Blustin A
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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DOI:
10.1086/425961
发表时间:
2004
期刊:
The Astrophysical Journal
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