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UNDERSTANDING THE AGN-HOST CONNECTION IN BROAD Mg II EMISSION-SELECTED AGN-HOST HYBRID QUASARS
Wang, J.; Wei, J. Y.
2009-05-01
发表期刊ASTROPHYSICAL JOURNAL
卷号696期号:1页码:741-748
摘要We study the issue of active galactic nucleus (AGN)-host connection in intermediate-z (1.2 > z > 0.4) galaxies with hybrid spectra ( hybrid QSOs for short). The observed spectra redward of the Balmer limit are dominated by starlight, and the spectra at the blue end by both an AGN continuum and an Mg II broad emission line. This unique property allows us to examine both an AGN and its host galaxy in an individual galaxy simultaneously. First, 15 hybrid QSOs are selected from the Sloan Digital Sky Survey (SDSS) Data Release 6. The spectra are then analyzed in detail for three objects: SDSS J162446.49+461946.7, SDSS J102633.32+103443.8, and SDSS J090036.44+381353.0. Our spectral analysis shows that the current star formation activities are strongly suppressed, and that the latest burst ages range from similar to 400 Myr to 1 Gyr. Based on the Mg II black hole masses, the three hybrid QSOs are consistent with the D(n) (4000) - L/L(Edd) sequence that was previously established in local AGNs. The three hybrid QSOs are located in the middle range of the sequence, which implies that the hybrid QSOs are at the transition stage not only from young to old AGNs, but also from a host-dominated phase to an AGN-dominated phase.
关键词Galaxies: Active Galaxies: Starburst Quasars: Individual (Sdss j102633.32+1034443)
DOI10.1088/0004-637X/696/1/741
收录类别SCI
语种英语
WOS记录号WOS:000265350100063
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被引频次:4[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/114a11/7946
专题光学天文研究部
作者单位Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
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Wang, J.,Wei, J. Y.. UNDERSTANDING THE AGN-HOST CONNECTION IN BROAD Mg II EMISSION-SELECTED AGN-HOST HYBRID QUASARS[J]. ASTROPHYSICAL JOURNAL,2009,696(1):741-748.
APA Wang, J.,&Wei, J. Y..(2009).UNDERSTANDING THE AGN-HOST CONNECTION IN BROAD Mg II EMISSION-SELECTED AGN-HOST HYBRID QUASARS.ASTROPHYSICAL JOURNAL,696(1),741-748.
MLA Wang, J.,et al."UNDERSTANDING THE AGN-HOST CONNECTION IN BROAD Mg II EMISSION-SELECTED AGN-HOST HYBRID QUASARS".ASTROPHYSICAL JOURNAL 696.1(2009):741-748.
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