THE MOSDEF SURVEY: AGN MULTI-WAVELENGTH IDENTIFICATION, SELECTION BIASES, AND HOST GALAXY PROPERTIES
THE MOSDEF SURVEY: AGN MULTI-WAVELENGTH IDENTIFICATION, SELECTION BIASES, AND HOST GALAXY PROPERTIES
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MOSDEF 调查：AGN 多波长识别、选择偏差和主星系特性
DOI：
10.3847/1538-4357/835/1/27
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
B. Siana
中科院分区：
文献类型：
--
作者：
Mojegan Azadi;A. Coil;J. Aird;N. Reddy;A. Shapley;W. Freeman;M. Kriek;G. Leung;B. Mobasher;S. Price;R. Sanders;I. Shivaei;B. Siana
我们介绍了MOSFIRE深部演化场(MOSDEF)对55个X射线、IR和光学选择活动星系核(AGN)的识别、选择偏差和宿主星系性质的调查结果。我们得到了星系和活动星系核的静止标架光谱，并使用BPT图来识别光学活动星系核。我们研究了在不同波长识别的活动星系核的唯一性和重叠性。在低质量星系中识别任何波长的活动星系核存在强烈的偏见，在最大质量的星系中识别IR活动星系核也存在额外的偏见。AgN宿主的恒星形成率(SFR)范围很大，类似于在考虑恒星质量选择效应后的非活动星系。然而，我们发现(在∼2-3σ意义上)IR活动星系核位于相对稳定比较高的尘埃星系中，而光学活动星系核位于稳定比相对较低的尘埃星系中。X射线活动星系核选择没有显示出与宿主星系SFR的偏见。这些结果与红移较低的较大规模研究的结果一致。在恒星形成星系中，一旦考虑到选择偏差，我们在物理性质与非活动星系相似的星系中发现活动星系核，在特定类型的星系中没有活动星系核活动的证据。这与任何恒星形成的宿主星系中的活动星系核被随机注入燃料是一致的。我们没有发现单个AGN主机的SFR和AGN光度之间存在显著的相关性，这可能表明星系的增长和它们的超大质量黑洞之间的时间尺度差异。
We present results from the MOSFIRE Deep Evolution Field (MOSDEF) survey on the identification, selection biases, and host galaxy properties of 55 X-ray, IR, and optically selected active galactic nuclei (AGNs) at . We obtain rest-frame optical spectra of galaxies and AGNs and use the BPT diagram to identify optical AGNs. We examine the uniqueness and overlap of the AGNs identified at different wavelengths. There is a strong bias against identifying AGNs at any wavelength in low-mass galaxies, and an additional bias against identifying IR AGNs in the most massive galaxies. AGN hosts span a wide range of star formation rates (SFRs), similar to inactive galaxies once stellar mass selection effects are accounted for. However, we find (at ∼2–3σ significance) that IR AGNs are in less dusty galaxies with relatively higher SFR and optical AGNs in dusty galaxies with relatively lower SFR. X-ray AGN selection does not display a bias with host galaxy SFR. These results are consistent with those from larger studies at lower redshifts. Within star-forming galaxies, once selection biases are accounted for, we find AGNs in galaxies with similar physical properties as inactive galaxies, with no evidence for AGN activity in particular types of galaxies. This is consistent with AGNs being fueled stochastically in any star-forming host galaxy. We do not detect a significant correlation between SFR and AGN luminosity for individual AGN hosts, which may indicate the timescale difference between the growth of galaxies and their supermassive black holes.
影响因子：
64.8
作者：
J. Kormendy;Ralf Bender;M. Cornell
通讯作者：
J. Kormendy;Ralf Bender;M. Cornell