A model for the distribution of material generating the soft X-ray background

Details A model for the distribution of material generating the soft X-ray background A model for the distribution of material generating the soft X-ray background

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...354..211s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 354, May 1, 1990, p. 211-219.

Astronomy and Astrophysics

Astrophysics

139

Astronomical Models, Background Radiation, Interstellar Matter, X Ray Sources, Absorption Spectra, Emission Spectra, Hydrogen, Iue, Thermal Emission

Scientific paper

The observational evidence relating to the soft X-ray diffuse background is discussed, and a simple model for its source and spatial structure is presented. In this simple model with one free parameter, the observed 1/4 keV X-ray intensity originates as thermal emission from a uniform hot plasma filling a cavity in the neutral material of the Galactic disk which contains the sun. Variations in the observed X-ray intensity are due to variations in the extent of the emission volume and therefore the emission measure of the plasma. The model reproduces the observed negative correlation between X-ray intensity and H I column density and predicts reasonable values for interstellar medium parameters.

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