Extended X-ray Emissions from the Radio Galaxies Centaurus B and Fornax A Makoto Tashiro 1 , Naoki Isobe 2 , Masaya Suzuki 1 Kouichi Ito 1 , Keiichi Abe 1 , and Kazuo Makishima 3 1:Saitama Univ., 2: ISAS/JAXA, 3:Univ. of Tok yo ASCA (ISAS) 1. XMM-Newton observation Centaurus B 2. Summary diagrams of IC-X-ray obs ervation from radio lobes 3. ASCA and Chandra observations of Fornax A
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Extended X-ray Emissions from the Radio Galaxies Centaurus B and Fornax A
Extended X-ray Emissions from the Radio Galaxies Centaurus B and Fornax A. Makoto Tashiro 1 , Naoki Isobe 2 , Masaya Suzuki 1 Kouichi Ito 1 , Keiichi Abe 1 , and Kazuo Makishima 3 1:Saitama Univ., 2: ISAS/JAXA, 3:Univ. of Tokyo. XMM-Newton observation Centaurus B - PowerPoint PPT Presentation
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Non-thermal radio and X-ray emissions in jets and lobes (e.g. Harris & Grindlay 1979, MNRAS 188, 25)
Synchrotron Radio Emission
flux: FSR ∝ ueumV energy index : SR
ue : energy density of electronsum : energy density of magnetic fieldsV : Volume of the Lobe
by comparing FSR and FIC
ue and um
Inverse Compton (X-ray) Emission
flux : FIC ∝ ueuseedV energy index : IC = SR
ueed=uCMB+usync+ugal+…
uCMB : energy density of CMB4.1 x 10 –13 (1 + z) 4 erg cm-3
in many cases….. useed~uCMB
Centarusu B: structures and energy densities
• “Jet”– um~ (3.6 × 10-15)()2
– ue~ (2.2 × 10-7) (10/)2
ueum)~ 108 (10/)4
(B ~0.3 G)
• “arrowhead”– um~ (4.2× 10-15)()2
– ue~ (1.0 × 10-10) (10/ )2
ueum)~ 105 (10/)4
(B ~ 0.3 G)
• “Jet”– um~ (3.6 × 10-15)()2
– ue~ (2.2 × 10-7) (10/)2
ueum)~ 108 (10/)4
(B ~0.3 G)
• “arrowhead”– um~ (4.2× 10-15)()2
– ue~ (1.0 × 10-10) (10/ )2
ueum)~ 105 (10/)4
(B ~ 0.3 G)
• “diffuse”– um~ (7.3 × 10-14)
(B ~ 1.4 G)
– ue~ (6.2 × 10-12)
ueum)~ 100 (in average of the lobe)
• “diffuse”– um~ (7.3 × 10-14)
(B ~ 1.4 G)
– ue~ (6.2 × 10-12)
ueum)~ 100 (in average of the lobe)
Detected the diffuse X-ray emission and X-ray bright structures (“jet”, “arrowhead”) Derived energy distributions in the “jet” & “arrowhead”, considering their expected bulk motions (~0.94 (from radio luminosity ratio)), are….