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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
Source PublicationASTROPHYSICAL JOURNAL
2017-09-01
Volume846Issue:1Pages:78-87
DOI10.3847/1538-4357/aa8463
Contribution Rank第1完成单位
Indexed BySCI
KeywordGalaxies: Active Galaxies: Luminosity Function Mass Function Radio Continuum: Galaxies
Abstract

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.

Funding ProjectNational Natural Science Foundation of China[11603066] ; National Natural Science Foundation of China[11173054] ; National Natural Science Foundation of China[11133006] ; National Natural Science Foundation of China[11163006] ; National Natural Science Foundation of China[11573060] ; National Natural Science Foundation of China[11673062] ; Policy Research Program of Chinese Academy of Sciences[KJCX2-YW-T24] ; CAS
Funding OrganizationNational Natural Science Foundation of China[11603066, 11173054, 11133006, 11163006, 11573060, 11673062] ; Policy Research Program of Chinese Academy of Sciences[KJCX2-YW-T24] ; CAS
Language英语
Subject Area天文学 ; 天体物理学 ; 高能天体物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
Archive Date2017-09-02
WOS IDWOS:000409019800009
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordACTIVE GALACTIC NUCLEI ; GALAXY REDSHIFT SURVEY ; STAR-FORMING GALAXIES ; DIGITAL-SKY-SURVEY ; 1.4 GHZ ; COSMOLOGICAL EVOLUTION ; COSMIC EVOLUTION ; OPTICAL LUMINOSITY ; CUTOFF ; SAMPLE
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/11891
Collection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
Corresponding AuthorYuan ZL(袁尊理)
Affiliation1.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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
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.(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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