Multiwavelength study of energy injections into the hotspot from the active galactic nucleus jet

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Multiwavelength study of energy injections into the hotspot from the active galactic nucleus jet

Persistent ID (NDL): info:ndljp/pid/12911793

Material type: 博士論文

Author: 砂田, 裕志

Publisher: 埼玉大学大学院理工学研究科

Publication date: 2022

Material Format: Digital

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Name of awarding university/degree: 埼玉大学,博士(理学)

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Note (General)：: type:textChapter 1. Introduction 1Chapter 2. Energy flow in radio galaxy 3 2.1 nucleus . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

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Material Type: 博士論文
Title: Multiwavelength study of energy injections into the hotspot from the active galactic nucleus jet
Author/Editor: 砂田, 裕志
Author Heading: 砂田, 裕志
Publication, Distribution, etc.: 埼玉大学大学院理工学研究科
Publication Date: 2022
Publication Date (W3CDTF): 2022
Alternative Title: 多波長観測による活動銀河核ジェットからホットスポットへのエネルギー供給の研究
Degree grantor/type: 埼玉大学
Date Granted: 2022-03-24
Date Granted (W3CDTF): 2022-03-24
Dissertation Number: 甲第1238号
Degree Type: 博士(理学)
Text Language Code: eng
Target Audience: 一般
Note (General): type:text
Chapter 1. Introduction 1Chapter 2. Energy flow in radio galaxy 3 2.1 nucleus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.2 jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.3 hot spot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.4 lobe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Chapter 3. Broadband radiation of hot spots 5 3.1 Radiative process of the hot spot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.1.1 Synchrotron radiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.1.2 Inverse Compton scattering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.2 Spectral energy distribution of hot spots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.2.1 Synchrotron spectrum with radiative cooling . . . . . . . . . . . . . . . . . . . . . . 7 3.2.2 SSC process and energetics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Chapter 4. Instrument 9 4.1 Herschel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.2 XMM-Newton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.3 NuSTAR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Chapter 5. Hot spots of Cygnus A and Pictor A 11 5.1 Characters of Pic A and Cyg A among hot spots . . . . . . . . . . . . . . . . . . . . . . . . 11 5.2 Previous studies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5.2.1 Cygnus A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5.2.2 Pictor A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Chapter 6. Observation and Analysis 13 6.1 FIR study of Cygnus A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6.1.1 FIR observation and analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Herschel Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 FIR images . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6.1.2 FIR photometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 6.1.3 Spectrum of the hot spot D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Subtraction of the contamination from the hot spot E . . . . . . . . . . . . . . . . . 17 Spectral modelling of the hot spot D . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6.2 UV to hard X-ray study of Pictor A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 6.2.1 Chandra . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 6.2.2 XMM-Newton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 6.2.3 NuSTAR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 6.2.4 Image analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 XMM-Newton image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 NuSTAR image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 6.2.5 Time variability analysis using Chandra data . . . . . . . . . . . . . . . . . . . . . . 24 6.2.6 X-ray Spectral analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 XMM-Newton spectrum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Chandra Spectrum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 NuSTAR Spectrum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Broadband X-ray spectrum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 6.2.7 Low energy spectrum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Chapter 7. Disscusion 35 7.1 SED of Cygnus A hotspot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 7.1.1 FIR Evidence of the cooling break . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 7.1.2 Magnetic-field estimation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Constraint from the cooling break frequency . . . . . . . . . . . . . . . . . . . . . . 36 Constraint from the X-ray spectrum . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Magnetic field determination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 7.1.3 Validity of the SSC scenario . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 7.2 SED of Pictor A hotspot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 7.2.1 Interpretation of the UV spectrum . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 7.3 Origin of the X-ray from Pictor A hot spot . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 7.3.1 Interpretation of the X-ray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 7.3.2 Accelerated electron energy distribution . . . . . . . . . . . . . . . . . . . . . . . . 42 Reference 45
指導教員 : 寺田幸功准教授
DOI: 10.24561/00019783
https://doi.org/10.24561/00019783
Persistent ID (NDL): info:ndljp/pid/12911793
https://dl.ndl.go.jp/pid/12911793
Collection: 障害者向け資料
Collection (Materials For Handicapped People:1): テキストデータ
Collection (particular): 国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文
https://dl.ndl.go.jp/collections/A00014
Acquisition Basis: 博士論文（自動収集）
Date Accepted (W3CDTF): 2023-07-08T03:42:33+09:00
Format (IMT): application/pdf
Access Restrictions: 国立国会図書館内限定公開
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Availability of remote photoduplication service: 可
Periodical Title (URI): http://dx.doi.org/10.24561/00019783
http://id.nii.ac.jp/1586/00019783/
Data Provider (Database): 国立国会図書館 : 国立国会図書館デジタルコレクション
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