A distinct hard-X-ray emission component is reported within the central four parsecs by eight parsecs of the Galaxy; this emission is more sharply peaked toward the Galactic Centre than is the surface brightness of the soft X-ray population, and all the interpretations of this emission pose significant challenges to our understanding of stellar evolution, binary formation and cosmic-ray production in the Galactic Centre.
- Kerstin Perez
- Charles J. Hailey
- Andreas Zoglauer