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Modeling the Galactic ¾ keV X-ray Background

Published online by Cambridge University Press:  12 April 2016

M.J. Freyberg  and
J.H.M.M. Schmitt
M.J. Freyberg
Affiliation:
Max–Planck–Institut für extraterrestrische Physik, D-85740 Garching, Germany
J.H.M.M. Schmitt
Affiliation:
Max–Planck–Institut für extraterrestrische Physik, D-85740 Garching, Germany

Abstract

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We have analyzed the ROSAT PSPC all-sky survey maps of the soft X-ray background (SXRB) in the ¾ keV band. One approach was to study the large-scale distribution of the X-ray emission with a multipole analysis. Here a significant dipole toward the galactic center region was found. This is interpreted in terms of variation of distant X-ray emission, e.g. galactic halo. Also a smallscale structure analysis of the ¾ keV X-ray sky has been performed and a new analytic fluctuation probability distribution has been derived. No significant excess over the expected extragalactic point source contribution has been found. Finally, X-ray colours have been used to investigate spectral variations of the SXRB.

Type
Part VI Distant Hot Gas, SXRB Fluctuations, Dust, Gamma-rays
Information
International Astronomical Union Colloquium , Volume 166: The Local Bubble and Beyond , 1997 , pp. 309 - 320
Copyright
Copyright © Springer-Verlag 1998

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