A high energy X-ray study of the galactic center

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Continuum Mechanics, Milky Way Galaxy, X Ray Sources, Energy Levels, Gamma Rays, Spectra, Time, Variations

Scientific paper

In this project I have studied the characteristics of the high-energy X-ray sources within 20 deg of the center of the Milky Way Galaxy. The major aim was to obtain an acceptable fit to data from the UCSD/MIT Hard X-ray and Low Energy Gamma-Ray experiment on HEAO-1. In this manner, I could study the spectra, positions and time-variability of about 25 sources. The major results of this project are the following: (1) most of the sources have steeply falling spectra as expected, (2) an intense, hard source exists within 0.5 deg of the galactic center, and it has a two-component spectrum which can be extrapolated to higher energy at the intensity of the gamma-ray continuum, which implies that this continuum is a composite of a number of sources.

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