Suzaku perspective on the Galactic Center

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Presentation transcript:

Suzaku perspective on the Galactic Center The “40-keV Plasma” vs “10-keV Plasma” What is the Origin of the 6.7 keV-line Plasma ? Are the Galactic Center and Ridge emissions Same Origin ? Big bang of Sgr A* or Multi-SNe or ? (1) X-ray reflection Nebulae: Sgr B2, Sgr C, M0.01-0.09 (2) Supernovae and SNRs: Sgr A East,　G359.8 G0.570 (3) Non Thermal Jets, Filaments, and Shell

What is our Galactic Center ? Who resembles the Milky Way ? 　　　　　2 　　5 　　　　　　　　　2 　5 　　　2 5 10　keV 6.64keV, EW=120eV Milky Way NGC253 NGC1068 6.4keV, EW=1200eV 6.7 1430eV 6.9 494eV 　　　 2 　 10 5 　　 10　 5 10　 NGC253: Pietsch et al. 2001, M81:Page et al. 2004, M31: Takahashi et al. 2004, NGC1068: Matt et al. 2004

(1) X-ray Reflection Nebula Sgr B2 M0.01-0.09 Sgr C Under Construction

(1’)　Ｏｔｈｅｒ　6.4 keV line　Clump

Kicked-off Neutron Star ? Foreground source (2) Sgr A East =Young SNR Thermal Plasma ( ~ 4 keV) Kicked-off Neutron Star ? Sgr A* Park et al. 2005 Sakano et al. 2004 Sgr A East (age ~1000 year) Maeda et al. 2002

(3) Non Thermal Structrue Shell of SNR ? like SN1006 or due to Nuclear Burst ? Sakano et al. 2003

1 2 3 Non Thermal X-ray 　　　　　 Jets and filaments

Key Questions on the iron line ASCA Mapping with thw3-iron Lines Key Questions on the iron line Which line is cｌumpy ? Only 6.4 keV line (XRN) ? How about 6.7 and 6.9 keV lines ? Are these intensities and the line ratio uniform ? Any non-thermal structure ? Suzaku Mapping of 6.4, 6.7 and 6.9 keV line with a unit scale of ~5 arc-min.

Sgr B2 other structure G0.570-0.018 Chandra 100 ksec XISx4 100 ksec

1 arcmin region spectra The East of Sgr A* Chandra 50 ksec XISx4 100 ksec

The ＷｅｓｔｏｆＳｇｒＡ＊ａｎｄＳｇｒＣ XISx4 100 ksec

Hard Diffuse Component According to the latitudinal scanning observation of RXTE-PCA, the intensity of diffuse emission at the Galactic center can be estimated.