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The Galactic Center is a Treasure Box of High Energy Physics

The Galactic Center is a Treasure Box of High Energy Physics The Nearest AGN and Star Burst Galaxy. I will report a current picture of the Galactic Center, then move on the Astro-H perspect ive. Global structure of GCXE and GRXE Origin ? --> Star Burst Activity or AGN?

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The Galactic Center is a Treasure Box of High Energy Physics

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  1. The Galactic Center is a Treasure Box of High Energy Physics The Nearest AGN and Star Burst Galaxy. I will report a current picture of the Galactic Center, then move on the Astro-H perspective • Global structure of GCXE and GRXE • Origin ? --> Star Burst Activity or AGN? • AGN Activity : Kαline of neutral iron What can we learn with SXS and HXI+SXI ?

  2. GCXE GCXE GRXE GRXE 5—8 keV Fe I (6.4 keV) FeXXV-Ka FeXXVI-Lya S XV-Ka S XVI-Lya H P L P

  3. l, b distribution of Low & High Temperature Plasma(LP, HP) and Neutral Iron (Uchiyama et al. 2012 in preparation) b GCXE 0.5 deg Soft (2.3-5 keV) S XV-VI Hard (5—8 keV) Fe XXV-VI Fe I (6.4 keV line) l 0.5 deg 5 deg GRXE 17-60 keV band (Integral) scale height ~10 deg. (Krivonos et al. 2007)  Astro-H (HXI) l 50 deg

  4. S Ar Ca Fe GC GR GC GR 2-kT plasma + 6.4 keV line GCXE GRXE kTH (keV) 7.4 6.7 kTL (keV) 0.98 1.45 Ab (solar) 1.35 0.71 EMH/EML 0.37 0.42 Γ 2.1 EW6.4 (eV) 445 S Ar Ca Fe (Uchiyama et al. 2012 in preparation)

  5. Using this strong line (single), we measure the Galactic rotation curve. ΔV ~ 10 km/s Does Hot plasma show similar rotation as hose of stars, cold gas, star clusters or same ? expansion ? Plasma states (collisional ex, recombination, & temperature). So Astro-H can determine more reliable parameters Lugten et al. 1986 Crawford etal. 1985

  6. Sgr D C E A B Past flare of Sgr A* indicated by the 6.4keV Line Ponti et al. 2010 Capelli et al. 2012 Nobukawa et al. 2011

  7. Hard X-ray=Compton Scattered Component calibrator Fe K line (Inui et al. 2009) Sgr B2 (20-60 keV) Terrier et al. 2010

  8. 1042 Clump2, Sgr D & E ？ 2014 ？ Light Curve of Sgr A* 1041 1040 1039 1038 Sgr B, C Sgr A* Luminosity (ergs/s) Sgr A 1037 1036 1035 1034 1033 -104 -1000 -100 -10 Past Present Time (yr) Activity of Sgr A*(SMBH) In the Past, at Present, and in near Future We need 3-D position (not only projected distance) and density of the molecular cloud. 1) Suzaku method  Astro-H methods 2) EW6.4 = 850ZFe/ (1 + cos 2θ) (eV), ZFe ~ NFe (iron edge) 3) Compton shoulder of the 6.4 keV line, Eedge=6.4/(1.013+ 0.013cos θ ) (keV)

  9. X-ray Tomography Behind Sgr A* Front Absorbed プラズマ成分 MC Observer Ryu et al. 2010 ,2012 very delicate spectrum analysis.We need accurate spectra (Astro-H SXS)

  10. p (MeV) σ∼10 eV e-(keV) σ∼0 eV Sgr B2 Radio Arc NFE NFE Compton shoulder XRN (Sgr B2, Radio Arc) : Detection of Compton shoulder --> cos θ and NFe Other regions: Separation of the 6.4 keV and Thermal Plasmas If NFE is small, then origin may be electron or proton

  11. HXI:Hard X-ray Imaging Spectroscopy of Sgr A* and Sgr B Integral (IBIS/ISGRI) Belanger et al. 2004, 2006 20-30 keV 30-40 keV 56-85 keV 40-56 keV NGC 4151 (Sy-1 AGN) Sgr B2 Zdziarski et al. 2002 Revnivtsev et al. 2004

  12. Compton Mirror of Sgr A* Neronov et al. 2005 Revnivtsev et al. 2004 r = 6’ (Sgr A*+ diffuse) Sgr B2 (Mirror of Sgr A* when it was 105-6 times brighter) r = 15’’ (SgrA* only) Sgr A Astro-H can observe Sgr A* both in the “active” and “quiescent” states.With Astro-H/HXI we can determine contamination(GCXE)-free Sgr A* (present) and Sgr B (past) spectra. Accretion on Sgr A* at present is RIAF, How was in the past flare.

  13. Fermi Bubble & Jet Su et al.2010 These past activities possibly had large impacts on the GC plasma . Even at present, the GC plasma may be transient or in dynamical phase.

  14. Jet of Recombining Plasma ? kTz =kTe= 0.66 keV Senda et al. 2006 Nakashima et al. 2012, in pre. GP Si-LyαRRC 1’ 120 pc kTz >kTe= 0.58 keV nt= 7.9×1011 s/cc

  15. Summary Galactic Center region is ideal laboratory for High energy Astronomy with many variety of active phenomena. These phenomena are closely related with each other, and hence these are “degenerated” The past instruments were not able to resolve the “degeneracy”. Astro-H is the first satellite to resolve the “degeneracy”.

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