1. Target selection The GC hot plasma Sgr A East Sgr B2 / Radio arc
plasma dynamics, galactic rotation
Sgr A East
SNR dynamics, galactic rotation
Sgr B2 / Radio arc
X-ray reflection nebula, Compton shoulder / recoil

2. 　　　　　　　　σ　
Thermal motion
⇒ Vth～1700 km/s @10keV
⇒　σ～ 4 eV
Turbulent Motion of the cloud　~70km/s
⇒　σ～ 1.5 eV
　　　　　　　ΔE
　Expanding　Velocity of Hot Plasma
　Galactic rotation curve
⇒　Vrot　～　20 pc
⇒　ΔE ～ 0.4 eV

3. GC hot plasma Neutral Iron (6.4 keV) Trace the dynamics of the
Cold Molecular cloud
Galactic Rotation
He/H-like Fe-K (6.7 / 6.9 keV)
Trace the dynamics of the hot plasma
⇒ Dynamics of the hot plasma
Galactic Rotation or Thermal motion ?
Sgr A East
Sgr A*
GC hot
Plasma
Rotation curve near
the GC region

4. Hot Plasma 100 ks 6.4 keV Lya 6.4 keV ±0.5 eV ±0.3 eV 6.7 keV ±0.5 eV
Galactic rotation
& Thermal Motion
are detectable.
6.7 / 6.9 keV Line
Ionization Temp.
6.7 keV / satellites
Electron Temp.
6.7 & 6.7 width
Ion Temp
6.4 keV
Lya

5. Sgr A East
resonance
inter-combinations Line center error ±0.3 eV
forbidden Line width error ±0.4 eV
Li/Be-like satellites km/s galactic rotation: detectable
He-like Complex:
0.19 c/s/XRS
He-like Resonance:
0.05 c/s/XRS
He-like Resonance: 0.19 c/s/XRS

6. Sgr B2 / Radio Arc X-ray reflection nebulae (XRN)
Compton shoulder of keV line
⇒ Geometry of the Irradiation source　& Cloud
Compton recoil of 6.7 keV irradiation
　⇒ 3D configuration of Molecular cloud and Irradiating Source (Sgr A East). 3’
x1038
(year)
Past luminosities of Sgr A*

7. Sgr B2 (100 ksec) Neutral iron line: 7x10-3 c/s/XRS
line center 6.38 ±0.3 eV
line width 1.7 ±0.4 eV (70km/s)
Compton 6.37±10 eV
Irradiation direction 10 %

8. Radio Arc (100 ksec) Neutral iron line 3.7x10-3 c/s He-like resonance
Compton Recoil ?
center ±0.3 eV
width ±0.5 eV
center ±1.2 eV
width ±1.5 eV