Spectrum composition of galactic center X-ray emission with point and diffuse X-ray sources

This paper reports that the X-ray spectrum from Galactic Center Emission (GCXE) is expressed by assembly of active binaries, non-magnetic Cataclysmic Variables, magnetic Variables (X-ray star: XAS), cold matter and diffuse sources. In fitting limited components XASs, GCXE exhibits significant excesses with $\chi^2/d.o.f. =5.67$. The are found at energies K$\alpha$, He$\alpha$, Ly$\alpha$ radiative recombination continuum S, Fe Ni. By adding sources, nicely reproduced = 1.53$, which a first quantitative model for origin spectrum. drastic improvement mainly due to recombining plasmas in indicate presence high-energy activity Sgr A$^*$ past $> 1000$~years.