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arXiv 1312.4563astro-ph.GAastro-ph.CO
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AGN吸收与宿主半乳糖苷有关

AGN Absorption Linked to Host Galaxies

Stéphanie Juneau

摘要:

活动星系核的多波长识别不仅对获得更完整的普查至关重要,而且对了解核活动的物理状态(遮蔽、效率等)也至关重要。当宿主星系正在形成恒星时,全色策略发挥着特别重要的作用。选择0.3<z<1的远红外星系,并在X射线,光学光谱,中红外和射电区域使用AGN示踪剂,我们发现AGN的分数比以前的研究高出两倍,这要归功于AGN识别方法的结合,特别是最近的质量激发(MEx)诊断图。此外,我们发现活动星系核的X射线吸收和特定的恒星形成率(sSFR)的主机星系之间的一个有趣的关系,表明X射线吸收和气体分数或气体几何形状的主机之间的物理联系。这些发现对我们目前对活动星系核统一模型和黑洞-星系连接的性质的理解都有影响。这些会议记录回顾了Juneau等人(2013,ApJ 764,176)的选定结果及其影响。最初的工作涉及货物和海洋数据服务小组和AEGIS小组的几名成员。

英文摘要:

Multiwavelength identification of AGN is crucial not only to obtain a more complete census, but also to learn about the physical state of the nuclear activity (obscuration, efficiency, etc.). A panchromatic strategy plays an especially important role when the host galaxies are star-forming. Selecting far-Infrared galaxies at 0.3<z<1, and using AGN tracers in the X-ray, optical spectra, mid-infrared, and radio regimes, we found a twice higher AGN fraction than previous studies, thanks to the combined AGN identification methods and in particular the recent Mass-Excitation (MEx) diagnostic diagram. We furthermore find an intriguing relation between AGN X-ray absorption and the specific star formation rate (sSFR) of the host galaxies, indicating a physical link between X-ray absorption and either the gas fraction or the gas geometry in the hosts. These findings have implications for our current understanding of both the AGN unification model and the nature of the black hole-galaxy connection. These proceedings review selected results by Juneau et al. (2013, ApJ 764, 176), and their implications. The original work involved several members from the GOODS and AEGIS teams.

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