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A Mixture Evolution Scenario of the AGN Radio Luminosity Function. II. Do Low- and High-power Radio-loud AGNs Evolve Differently?
Yuan ZL(袁尊理)1,2,3; Wang JC(王建成)1,2,3; Zhou M(周明)1,2,3; Qin LH(秦龙华)1,2,3,4; Mao JR(毛基荣)1,2,3; Yuan, Zunli(Chinese Acad Sci, Yunnan Observ, Kunming 650216, Yunnan, Peoples R China)
发表期刊ASTROPHYSICAL JOURNAL
2017-09-01
卷号846期号:1页码:78-87
DOI10.3847/1538-4357/aa8463
产权排序第1完成单位
收录类别SCI
关键词Galaxies: Active Galaxies: Luminosity Function Mass Function Radio Continuum: Galaxies
摘要Following previous work, we further confirm that the cosmic evolution of steep-spectrum radio-loud AGNs (active galactic nuclei) can be reproduced by a simple combination of density evolution (DE) and luminosity evolution (LE). This mixture evolution scenario can naturally explain the luminosity-dependent evolution of radio-loud AGNs. Our models successfully fitted a large amount of data on radio luminosity functions of steep-spectrum sources and multi-frequency source counts. The modeling indicates that the DE slowly increases as (1 + z)(0.3 similar to 1.3) out to z similar to 0.8, and then rapidly decreases as (1 + z)(-6.8 similar to-5.7), while the LE rapidly increases as (1 + z)(4.8) out to a higher redshift (at least z > 3.5). We find a high-redshift decline (i.e., redshift cutoff) in the number density of steep-spectrum radio sources, but we cannot conclude whether such a decline is sharp or shallow. We believe that whether a redshift cutoff occurs or not depends mainly on DE, while its steepness is decided by LE, which, however, cannot be well constrained due to the lack of high-redshift samples. Most intriguingly, according to our mixture evolution scenario, there appears to be no need for different evolution for the low-and high-power radio-loud AGNs. Both types of sources experience the same combined evolution of DE and LE.
项目资助者National Natural Science Foundation of China(11603066, 11173054, 11133006, 11163006, 11573060, 11673062) ; Policy Research Program of Chinese Academy of Sciences(KJCX2-YW-T24) ; CAS "Light of West China" Program ; Strategic Priority Research Program ; Emergence of Cosmological Structures of the Chinese Academy of Sciences(XDB09000000) ; Hundred-Talent Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences(KJZD-EW-M06) ; Introducing Overseas Talent Plan of Yunnan Province
语种英语
学科领域天文学
文章类型Article
ISSN0004-637X
URL查看原文
归档日期2017-09-02
WOS记录号WOS:000409019800009
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ACTIVE GALACTIC NUCLEI ; GALAXY REDSHIFT SURVEY ; STAR-FORMING GALAXIES ; DIGITAL-SKY-SURVEY ; 1.4 GHZ ; COSMOLOGICAL EVOLUTION ; COSMIC EVOLUTION ; OPTICAL LUMINOSITY ; CUTOFF ; SAMPLE
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/11891
专题高能天体物理研究组
中国科学院天体结构与演化重点实验室
通讯作者Yuan, Zunli(Chinese Acad Sci, Yunnan Observ, Kunming 650216, Yunnan, Peoples R China)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, P. R. China
2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, P. R. China
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, P. R. China
4.University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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Yuan ZL,Wang JC,Zhou M,et al. A Mixture Evolution Scenario of the AGN Radio Luminosity Function. II. Do Low- and High-power Radio-loud AGNs Evolve Differently?[J]. ASTROPHYSICAL JOURNAL,2017,846(1):78-87.
APA Yuan ZL,Wang JC,Zhou M,Qin LH,Mao JR,&Yuan, Zunli.(2017).A Mixture Evolution Scenario of the AGN Radio Luminosity Function. II. Do Low- and High-power Radio-loud AGNs Evolve Differently?.ASTROPHYSICAL JOURNAL,846(1),78-87.
MLA Yuan ZL,et al."A Mixture Evolution Scenario of the AGN Radio Luminosity Function. II. Do Low- and High-power Radio-loud AGNs Evolve Differently?".ASTROPHYSICAL JOURNAL 846.1(2017):78-87.
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