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arXiv 1306.4316astro-ph.CO
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部分遮蔽对活动星系核中遮蔽部分光度依赖性的影响

The Effect of Partial Obscuration on the Luminosity Dependence of the Obscured Fraction in Active Galactic Nuclei

Jack H. Mayo, Andy Lawrence

摘要:

活动星系核(AGN)在不同观测体制下的巡天观测,似乎给出了不同的答案与光度的遮蔽部分的行为。基于最近的研究中看到的复杂的光谱,我们注意到,部分覆盖可以显着改变许多活动星系核的视光度,即使在表观X射线吸收校正。我们探讨这种效果是否可以重现所观察到的依赖性的模糊分数上的表观X射线光度之间看到2- 10千电子伏。我们可以在一个模型中再现观测到的趋势,其中33%的活动星系核是清晰的,30%是深埋的,37%有一系列中间部分覆盖。我们的模型也初步成功地再现了活动星系核的X射线与红外光度比的观测趋势。

英文摘要:

Surveys of Active Galactic Nuclei (AGN) in different observational regimes seem to give different answers for the behaviour of the obscured fraction with luminosity. Based on the complex spectra seen in recent studies, we note that partial covering could significantly change the apparent luminosities of many AGN, even after apparent X-ray absorption correction. We explore whether this effect could reproduce the observed dependence of the obscured fraction on the apparent X-ray luminosities seen between 2--10 keV. We can reproduce the observed trend in a model where 33 per cent of AGN are unobscured, 30 per cent are heavily buried, and 37 per cent have a range of intermediate partial coverings. Our model is also tentatively successful at reproducing observed trends in the X-ray vs. infrared luminosity ratio for AGN.

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