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arXiv 1402.3744astro-ph.GAastro-ph.CO
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活动星系核中[O III ] λ5007发射线的宽翼

The Broad Wing of [O III] λ5007 Emission Line in Active Galactic Nuclei

Zhixin Peng, Yanmei Chen, Qiusheng Gu, Kai Zhang

摘要:

利用SDSS DR 7中的一个2型活动星系核样品(其中[O III] λ5007发射线可以用宽翼和窄核两个高斯分量来模拟),研究了宽翼的起源以及宽翼速度漂移与活动星系核及其宿主星系物理参数之间的关系.我们发现,在统计上,机翼部件的通量与核心部件的通量大致相等。然而,翼分量的速度变化与活动星系核和宿主星系的物理性质,如热光度,爱丁顿比,超大质量黑洞的质量,D 4000,HδA或恒星质量,只有弱的相关性,如果有的话。通过比较我们的2型活动星系核样品和Zhang等(2011)的1型样品的速度漂移,我们认为[O III]宽翼起源于外流。

英文摘要:

We use a type 2 AGN sample from SDSS DR7 in which the [O III] λ5007 emission line can be modeled by two Gaussian components, a broad wing plus a narrow core, to investigate the origin of the broad wing and the connection between the velocity shift of the broad wing and the physical parameters of active galactic nuclei (AGNs) as well as their host galaxies. We find that the flux of the wing components is roughly equal to that of the core components in statistic. However, the velocity shift of the wing component has only weak, if any, correlations with the physical properties of AGNs and the host galaxies such as bolometric luminosity, the Eddington ratio, the mass of supermassive black holes, D4000, HδA or stellar mass. Comparing the velocity shift from our type 2 AGN sample to that from type 1 sample in Zhang et al. (2011), we suggest the [O III] broad wing originates from outflow.

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