New X-ray views of the Galactic center observed with Suzaku

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dc.creatorKoyama, Katsuji
dc.creatorHyodo, Yoshiaki
dc.creatorInui, Tatsuya
dc.date2006-09-08
dc.date.accessioned2026-07-07T10:23:34Z
dc.date.available2026-07-07T10:23:34Z
dc.descriptionWe report the diffuse X-ray emissions from the Sgr A and B regions observed with Suzaku. From the Sgr A region, we found many K-shell transition lines of iron and nickel. The brightest are K alpha lines from FeI, FeXXV and FeXXVI at 6.4 keV, 6.7 keV and 6.9 keV. In addition, K alpha lines of NiI and NiXXVII, K beta of FeI, FeXXV and FeXXVI, and K gamma of FeXXV and FeXXVI are detected for the first time. The center energy of K alpha of FeXXV favors collisional excitation as the origin for this line emission. The ionization temperature determined from the flux ratio of K alpha of FeXXV and FeXXVI is similar to the electron temperature determined from the flux ratio of K alpha and K beta of FeXXV, which are in the range of 5-7 keV. Consequently, the Galactic Center diffuse X-rays (GCDX) are consistent with emission from a plasma nearly in ionization equilibrium. The radio complex Sgr B region also exhibits K alpha lines of FeI, FeXXV and FeXXVI. The 6.7 keV line (FeXXV) map exhibits a local excess at (l,b) = (0.612, 0.01), and could be a new young SNR. The 6.4 keV image is clumpy with local excesses near Sgr B2 and at (l,b) = (0.74, -0.09). Like Sgr B2, this latter excess may be another X-ray reflection Nebulae (XRN).
dc.description9 pages, 8 figures, to be published in the proceedings of Galactic Center Workshop 2006
dc.identifierhttps://arxiv.org/abs/astro-ph/0609217
dc.identifierhttp://arxiv.org/abs/astro-ph/0609217
dc.identifierJ.Phys.Conf.Ser.54:95-102,2006
dc.identifierdoi:10.1088/1742-6596/54/1/017
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/175877
dc.subjectAstrophysics
dc.titleNew X-ray views of the Galactic center observed with Suzaku
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