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arXiv 2203.09196astro-ph.GA
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类星体单历元谱中外流分量的分离

Isolating an outflow component in single-epoch spectra of quasars

Paola Marziani, Alice Deconto-Machado, Ascension del Olmo

摘要:

气体外流似乎是1型和2型活动星系核的普遍性质。主要的诊断是由发射特征通过多普勒效应转移到更高的频率提供的,这意味着发射气体正在向观察者移动。然而,除了蓝移的存在下,观测签名的外流往往是不清楚的,并没有既定的标准存在隔离的综合,单历元光谱的1型活动星系核的外流贡献。用长缝光谱学或纤维光学样品贡献的典型孔径收集的发射光谱在宽范围的空间尺度上,使得难以分析不同运动学分量的线轮廓。然而,成千上万的类星体光谱收集在中等分辨率的要求适当的分析线的配置文件的发射区域的适当的动力学建模。在这个小的贡献,我们将分析几个配置文件的HI巴耳末线H \b{eta}从复合和单独的光谱辐射源在中等爱丁顿比(人口B以下Sulentic等,2000年)。在很宽的光度范围内检测到可能被追踪到由于窄线区域气体流出的特征和轮廓形状。

英文摘要:

Gaseous outflows appear to be a universal property of type-1 and type-2 active galactic nuclei (AGN). The main diagnostic is provided by emission features shifted to higher frequency via the Doppler effect, implying that the emitting gas is moving toward the observer. However, beyond the presence of blueshift, the observational signatures of the outflows are often unclear, and no established criteria exist to isolate the outflow contribution in the integrated, single-epoch spectra of type-1 AGN. The emission spectrum collected with the typical apertures of long-slit spectroscopy or of fiber optics sample contributions over a broad range of spatial scales, making it difficult to analyze the line profiles in terms of different kinematic components. Nevertheless, hundred of thousands of quasars spectra collected at moderate resolution demand a proper analysis of the line profiles for proper dynamical modelling of the emitting regions. In this small contribution we shall analyze several profiles of the HI Balmer line H\b{eta} from composite and individual optical spectra of sources radiating at moderate Eddington ratio (Population B following Sulentic et al. 2000). Features and profile shapes that might be traced to outflow due to narrow-line region gas are detected over a wide range of luminosity.

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