The X-ray diffuse emission from the Galactic Center

TL;DR

This study analyzes the diffuse X-ray emission from the Galactic Center, revealing energy-dependent spatial distribution and supporting the supernova remnant interpretation of SgrA East through spectral modeling.

Contribution

It provides a detailed spectral and spatial analysis of the diffuse X-ray emission, identifying two thermal plasma components and linking soft X-ray features to a supernova remnant.

Findings

Diffuse X-ray emission consists of two thermal plasma components (~0.6 keV and 8-9 keV).

Soft X-ray emission correlates with the radio halo of SgrA East.

Hard X-ray emission is symmetrically elongated along the Galactic Plane.

Abstract

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.