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The dying accretion and jet in a powerful radio galaxy of Hercules A
Wu, Lin-Hui1; Wu, Qing-Wen1; Feng, Jian-Chao2; Lu, Ru-Sen3,4; Fan, Xu-Liang5
2020-08-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume20Issue:8Pages:8
AbstractHercules A (Her A) is one of a rare class of dying and transition-type objects, which has a pair of giant, powerful radio lobes and a weak radio core. We reduce and analyze the radio data of Her A that were observed by the Expanded Very Large Array (EVLA) during 2010-2011 at C band. The intensity distribution is very smooth along the edge of the lobe front and the intensity also sharply decreases at the edge, which supports that magnetic fields may play an important role in radio lobes. The spectrum of the weak core is very steep and the core flux becomes weaker by about ten percent when compared to what was observed twenty years ago, which suggest that the central engine is still dying quickly. Her A deviates a lot from the relation between [O III] luminosity and low-frequency 178 MHz luminosity (L-O III-L-178MHz) as defined by other FR I/II sources. However, when only radio core emission is considered, it roughly follows anL(O III)-L(178 MHz)correlation. This result supports that the black-hole accretion and large-scale jet in Her A did not evolve simultaneously, and indicates that although the large-scale jet is still powerful, the accretion and inner jet have changed into an inactive state. Based on the estimated Bondi accretion rate, we model the spectrum of Her A with a radiatively inefficient accretion flow and jet model.
Keywordblack hole physics galaxies jets radiation mechanisms non-thermal galaxies magnetic fields radio continuum galaxies
Funding OrganizationNational Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Key Program of NSFC ; Key Program of NSFC ; Research Program of Fundamental and Frontier Sciences, Chinese Academy of Sciences ; Research Program of Fundamental and Frontier Sciences, Chinese Academy of Sciences ; NSFC ; NSFC ; Science and Technology Foundation of Guizhou Province ; Science and Technology Foundation of Guizhou Province ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Key Program of NSFC ; Key Program of NSFC ; Research Program of Fundamental and Frontier Sciences, Chinese Academy of Sciences ; Research Program of Fundamental and Frontier Sciences, Chinese Academy of Sciences ; NSFC ; NSFC ; Science and Technology Foundation of Guizhou Province ; Science and Technology Foundation of Guizhou Province ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Key Program of NSFC ; Key Program of NSFC ; Research Program of Fundamental and Frontier Sciences, Chinese Academy of Sciences ; Research Program of Fundamental and Frontier Sciences, Chinese Academy of Sciences ; NSFC ; NSFC ; Science and Technology Foundation of Guizhou Province ; Science and Technology Foundation of Guizhou Province ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Key Program of NSFC ; Key Program of NSFC ; Research Program of Fundamental and Frontier Sciences, Chinese Academy of Sciences ; Research Program of Fundamental and Frontier Sciences, Chinese Academy of Sciences ; NSFC ; NSFC ; Science and Technology Foundation of Guizhou Province ; Science and Technology Foundation of Guizhou Province
DOI10.1088/1674-4527/20/8/122
WOS KeywordADVECTION-DOMINATED ACCRETION ; X-RAY BINARIES ; NONTHERMAL EMISSION ; MAGNETIC-FIELDS ; BLACK-HOLES ; FR-I ; SAMPLE ; LOBES ; MULTIBAND ; DYNAMICS
Language英语
Funding ProjectNational Natural Science Foundation of China (NSFC)[U1931203] ; National Natural Science Foundation of China (NSFC)[11622324] ; National Natural Science Foundation of China (NSFC)[11573009] ; Key Program of NSFC[11933007] ; Research Program of Fundamental and Frontier Sciences, Chinese Academy of Sciences[ZDBS-LY-SLH011] ; NSFC[11947099] ; Science and Technology Foundation of Guizhou Province[QKHJC[2020]1Y018]
Funding OrganizationNational Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Key Program of NSFC ; Key Program of NSFC ; Research Program of Fundamental and Frontier Sciences, Chinese Academy of Sciences ; Research Program of Fundamental and Frontier Sciences, Chinese Academy of Sciences ; NSFC ; NSFC ; Science and Technology Foundation of Guizhou Province ; Science and Technology Foundation of Guizhou Province ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Key Program of NSFC ; Key Program of NSFC ; Research Program of Fundamental and Frontier Sciences, Chinese Academy of Sciences ; Research Program of Fundamental and Frontier Sciences, Chinese Academy of Sciences ; NSFC ; NSFC ; Science and Technology Foundation of Guizhou Province ; Science and Technology Foundation of Guizhou Province ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Key Program of NSFC ; Key Program of NSFC ; Research Program of Fundamental and Frontier Sciences, Chinese Academy of Sciences ; Research Program of Fundamental and Frontier Sciences, Chinese Academy of Sciences ; NSFC ; NSFC ; Science and Technology Foundation of Guizhou Province ; Science and Technology Foundation of Guizhou Province ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Key Program of NSFC ; Key Program of NSFC ; Research Program of Fundamental and Frontier Sciences, Chinese Academy of Sciences ; Research Program of Fundamental and Frontier Sciences, Chinese Academy of Sciences ; NSFC ; NSFC ; Science and Technology Foundation of Guizhou Province ; Science and Technology Foundation of Guizhou Province
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000563438800001
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/82173
Collection中国科学院国家天文台
Corresponding AuthorWu, Qing-Wen
Affiliation1.Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China
2.Guizhou Normal Univ, Sch Phys & Elect Sci, Guiyang 550001, Peoples R China
3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
4.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany
5.Shanghai Univ Engn Sci, Sch Math Phys & Stat, Shanghai 201620, Peoples R China
Recommended Citation
GB/T 7714
Wu, Lin-Hui,Wu, Qing-Wen,Feng, Jian-Chao,et al. The dying accretion and jet in a powerful radio galaxy of Hercules A[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2020,20(8):8.
APA Wu, Lin-Hui,Wu, Qing-Wen,Feng, Jian-Chao,Lu, Ru-Sen,&Fan, Xu-Liang.(2020).The dying accretion and jet in a powerful radio galaxy of Hercules A.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,20(8),8.
MLA Wu, Lin-Hui,et al."The dying accretion and jet in a powerful radio galaxy of Hercules A".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 20.8(2020):8.
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