Galactic Center Diffuse X-rays with Suzaku

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Presentation transcript:

Galactic Center Diffuse X-rays with Suzaku Katsuji Koyama, Kyoto University

: Collisional Excitation or Charge Exchange : Diffuse or Point Sources 3-Color Image Red: 6.7 keV Blue: 6.4 keV Green: 2.45 keV Origin of 6.7/6.9 keV Lines : Collisional Excitation or Charge Exchange : Diffuse or Point Sources (2) Discoveries of New SNR Candidates (3) Origin of 6.4 keV Line : X-Ray Reflection or Electron Bremsstrahｌung : Time Variability of the 6.4 keV clumps.

XIS: The Best Performance as an X-ray CCD ASCA 320 ksec (Koyama et al. 1996) Chandra 600ksec (Muno et al.2004) XMM 50 ksec (Tanaka) Si XIII Kα Si XIV Kα Si XIII Kβ S XV Kα S XVI Kα S XV Kβ Suzaku:　180 ksec

Energy 6 7 8 Fe24+Kα Fe25+Kα Fe24+Kβ Fe Kα Ni26+Kα Fe24+ Kβ Fe25+Kβ Si12+Kα Si12+Kβ Ar16+Kβ Ar16+Kα Si13+Kα Ca18+Kα Ca19+Kα Ar17+Kα S14+Kα S15+Kα S14+Kβ Energy

World (Universe) Records. But ! 60 mK, 7.0 eV @5.9 keV:　 World (Universe) Records. But　! The XRS Spectrum on Orbit Resonance (r) 6.703keV 1s2p1P1 Forbidden(f) 6.639keV Δl=0,Δs=1 Fine Structure of Fe24+ 1s2 1S0 1s2p3P0,1,2 Δl=1,Δs=0 1s2s 3S1 Name 　　　　　　　Transition　　　　Energy (eV) --------------------------------------------------------- Resonance (r)　 1s2s１S0-1s2p 1P1　　 6700.5 Intercombination line 　　　(x) 　　　　 1s2p1S0-1s2p 3P2　　　6682.4 　　　(y)　　　　　　 1s2p1S0-1s2p 3P01　　6667.6 Forbidden line (f)　1s2 1S0-1s2s 3S1　 6636.7

Name Observed Lab ⊿ (eV) ----------------------------- S Lya 2622.4+3.6-2.7 2621.6 0.8 FeLya 6969.5+2.8-2.1 6965.7 3.8 Mn Ka 5899.6+1.7-0.4 5895.1 4.5 Electron Capture = 6666eV Collisional Excitation= 6685 eV f r i r i f l l 6666eV 6685eV Wargelin, Beiersdorfer et al. 2005, ApJ, 634,687 FeXXV FeXXIV G-ratio = r / (i+f)

Iron and Ni line Diagnostics Electron T. Ionization T. Plasma T.