On the origin of X-ray oxygen emission lines in obscured AGN

V. Reynaldi, M. Guainazzi, S. Bianchi, I. Andruchow, I. Andruchow, Federico García, N. Salerno, I. L'opez
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引用次数: 1

Abstract

We present the Catalog of High REsolution Spectra of Obscured Sources (CHRESOS) from the XMM-Newton Science Archive. It comprises the emission-line luminosities of H- and He-like transitions from C to Si, and the Fe 3C and Fe 3G L-shell ones. Here, we concentrate on the soft X-ray OVII(f) and OVIII Ly_alpha emission lines to shed light onto the physical processes with which their formation can be related to: active galactic nucleus vs. star forming regions. We compare their luminosity with that of two other important oxygen key lines [OIII]5007A, in the optical, and [OIV]25.89mic, in the IR. We also test OVII(f) and OVIIILy_alpha luminosities against that of continuum bands in the IR and hard X-rays, which point to different ionization processes. We probe into those processes by analyzing photoionization and colisional ionization model predictions upon our lines. We show that both scenarios can explain the formation and observed intensities of OVII(f) and OVIII Ly_alpha. By analyzing the relationships between OVII(f) and OVIII Ly_alpha, and all other observables: [OIII]5007A, [OIV]25.89mic emission lines, and MIR-12mic, FIR-60mic, FIR-100mic, 2-10 keV and 14-195 keV continuum bands, we conclude that the AGN radiation field is mainly responsible of the soft X-ray oxygen excitation.
模糊AGN中x射线氧发射谱线的起源
本文介绍了xmm -牛顿科学档案馆的高分辨率模糊源光谱目录(chressos)。它包括从C到Si的H-和he -类跃迁以及Fe 3C和Fe 3G l壳层的发射在线光度。在这里,我们专注于软x射线OVII(f)和OVIII Ly_alpha发射线,以阐明与它们的形成有关的物理过程:活动星系核与恒星形成区域。我们将它们的光度与另外两条重要的氧关键线[OIII]5007A的光度进行了比较,[OIV]25.89微米的光度进行了比较。我们还测试了OVII(f)和oviily_alpha的亮度与红外和硬x射线的连续波段的亮度,这表明不同的电离过程。我们通过分析光电离和碰撞电离模型在我们的线上的预测来探讨这些过程。我们发现这两种情况都可以解释OVII(f)和OVIII Ly_alpha的形成和观测强度。通过分析OVII(f)和OVIII Ly_alpha与其他所有观测值[OIII]5007A、[OIV]25.89mic发射谱线以及MIR-12mic、FIR-60mic、FIR-100mic、2-10 keV和14-195 keV连续谱带之间的关系,我们得出AGN辐射场是软x射线氧激发的主要原因。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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