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Paper: X-raying the Galactic Interstellar Medium: First All-sky Correlation of X-ray and HI Data
Volume: 317, Milky Way Surveys: The Structure and Evolution of Our Galaxy
Page: 29
Authors: Pradas, J.; Kerp, J.; Kalberla, P.M.W.; Arnal, E.M.; Bajaja, E.; Morras, R.; Poppel, W.G.L.
Abstract: The 3-D structure and composition of the Galactic interstellar medium can be deduced from soft X-ray absorption observations. For this purpose, we cross-correlate the ROSAT all-sky survey with the H I 21-cm line all-sky distribution provided by the Leiden/Dwingweloo and Instituto Argentino de Radioastronomía surveys. We analyse the data for the whole ROSAT-PSPC energy window (0.1 keV to 2.1 keV) to derive a consistent model of the diffuse X-ray background radiation. This approach allows to deduce the 3-D structure of X-ray absorbing and emitting gas and to constrain the distance to some high- (HVC) and intermediate-velocity cloud (IVC) complexes.
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