The flat X-ray spectrum of the LINER NGC1052
The flat X-ray spectrum of the LINER NGC1052
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LINER NGC1052 的平面 X 射线光谱
DOI：
10.1046/j.1365-8711.1999.02470.x
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
N. O. A. D. Roma
中科院分区：
文献类型：
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作者：
M.Guainazzi;L. S. O. Esa;Estec;Noordwijk;N. O. A. D. Roma
我们报告了 ROSAT 和 ASCA 对 LINER NGC 1052 的观测，这是第一个观测到偏振光中的宽光线的观测。 2–10 keV 谱非常平坦，观察到 Γ ≃ 0 。 1. 核源部分或全部被柱密度约为 10 23 cm - 2 的物质屏幕遮挡的模型是对观察到的平坦度最令人信服的解释。这与 LINER 是一群低光度 AGN 的假设相一致，Seyfert 统一场景适用于此。正如迄今为止在一些 2 型 Seyferts 中所观察到的那样，或者如果吸积发生在平流主导的流动中时所预测的那样，固有光谱指数仍然相当平坦（γ instrinsic ≃ 1 . 0–1.4）。
We report on ROSAT and ASCA observations of the LINER NGC 1052, which is the first one where broad optical lines in polarized light have been observed. The 2– 10 keV spectrum is very flat, with a Γ observed ≃ 0 . 1. A model where a nuclear source is - partly or totally - obscured by a screen of matter with column density ∼ 10 23 cm − 2 is the most convincing explanation for the observed flatness. This agrees with the hypothesis that the LINERs are a population of low-luminosity AGN, to which the Seyfert unification scenario applies. The intrinsic spectral index is still rather flat (Γ instrinsic ≃ 1 . 0–1.4), as observed in a few type-2 Seyferts so far or predicted if the accretion occurs in an advection-dominated flow.