The X-ray Diffuse Emission from the Galactic Center

L. Sidoli(1,2) & S. Mereghetti(1)

(1) Istituto di Fisica Cosmica ``G. Occhialini" - C.N.R., Via Bassini 15, I-20133 Milano, Italy; e-mail: (sidoli, sandro)
(2) Dipartimento di Fisica, Universit\`a di Milano, Sez. Astrofisica, Via Celoria 16, I-20133 Milano, Italy

Paper: to appear in A&A Letters, 1999

EPrint Server: astro-ph/9908164


A long BeppoSAX observation of the Galactic Center region shows that the spectrum of the diffuse X-ray emission from the SgrA Complex can be described with the sum of two thermal plasma models with temperatures of ~0.6 keV and ~8-9 keV. The spatial distribution of the diffuse emission is energy dependent. While the hard X-ray emission has a nearly symmetric distribution elongated along the Galactic Plane, the soft X-rays (E < 5 keV) are remarkably well correlated with the triangular radio halo of SgrA East. The parameters derived for the soft component support the interpretation of the SgrA East shell in terms of an evolved supernova remnant.

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