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EVOLUTION OF [O III] lambda 5007 EMISSION-LINE PROFILES IN NARROW EMISSION-LINE GALAXIES
Wang, J.; Mao, Y. F.; Wei, J. Y.
2011-11-01
发表期刊ASTROPHYSICAL JOURNAL
卷号741期号:1
摘要The active galactic nucleus (AGN)-host co-evolution issue is investigated here by focusing on the evolution of the [O III] lambda 5007 emission-line profile. A large sample of narrow emission-line galaxies is selected from the Max-Planck Institute for Astrophysics/Johns Hopkins University Sloan Digital Sky Survey DR7 catalog to simultaneously measure both the [O III] line profile and circumnuclear stellar population in an individual spectrum. By requiring that (1) the [O III] line signal-to-noise ratio is larger than 30 and (2) the [O III] line width is larger than the instrumental resolution by a factor of two, our sample is narrowed down to 2333 Seyfert galaxies/LINERs (AGNs), 793 transition galaxies, and 190 star-forming galaxies. In addition to the commonly used profile parameters (i.e., line centroid, relative velocity shift, and velocity dispersion), two dimensionless shape parameters, skewness and kurtosis, are used to quantify the line shape deviation from a pure Gaussian function. We show that the transition galaxies are systematically associated with narrower line widths and weaker [O III] broad wings than the AGNs, which implies that the kinematics of emission-line gas are different in the two kinds of objects. By combining the measured host properties and line shape parameters, we find that the AGNs with stronger blue asymmetries tend to be associated with younger stellar populations. However, a similar trend is not identified in the transition galaxies. The failure likely results from a selection effect in which the transition galaxies are systematically associated with younger stellar populations than the AGNs. The evolutionary significance revealed here suggests that both narrow-line region kinematics and outflow feedback in AGNs co-evolve with their host galaxies.
关键词Galaxies: Active Galaxies: Evolution Quasars: Emission Lines
DOI10.1088/0004-637X/741/1/50
收录类别SCI
语种英语
WOS记录号WOS:000296769000050
引用统计
被引频次:15[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/7996
专题空间科学研究部
作者单位Chinese Acad Sci, Natl Astron Observ, Beijing 100021, Peoples R China
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Wang, J.,Mao, Y. F.,Wei, J. Y.. EVOLUTION OF [O III] lambda 5007 EMISSION-LINE PROFILES IN NARROW EMISSION-LINE GALAXIES[J]. ASTROPHYSICAL JOURNAL,2011,741(1).
APA Wang, J.,Mao, Y. F.,&Wei, J. Y..(2011).EVOLUTION OF [O III] lambda 5007 EMISSION-LINE PROFILES IN NARROW EMISSION-LINE GALAXIES.ASTROPHYSICAL JOURNAL,741(1).
MLA Wang, J.,et al."EVOLUTION OF [O III] lambda 5007 EMISSION-LINE PROFILES IN NARROW EMISSION-LINE GALAXIES".ASTROPHYSICAL JOURNAL 741.1(2011).
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