Small scale H I structure and the soft X-ray background

Details Small scale H I structure and the soft X-ray background Small scale H I structure and the soft X-ray background

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986stin...8627169j&link_type=abstract

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Astronomy and Astrophysics

Astronomy

Halos, Interstellar Matter, Interstellar Radiation, X Ray Spectra, Absorption Cross Sections, Radio Sources (Astronomy), X Ray Astronomy

Scientific paper

The observed anticorrelation between diffuse soft X-ray flux and H I column density has been explained as absorption of soft X-rays produced in a hot galactic halo, assuming that the neutral interstellar material is sufficiently clumped to reduce the soft X-ray absorption cross section by a factor of two to three. A 21 cm emission line study of H I column density variations at intermediate and high galactic latitudes to 10' spatial resolution has been done. The results confirm conclusions from preliminary work at coarser resolution, and in combination with other data appear to rule out the hypothesis that clumping of neutral interstellar matter on any angular scale significantly reduces X-ray absorption cross sections in the 0.13 - 0.28 keV energy range. It is concluded therefore that the observed anticorrelation is not primarily a consequence of absorption of soft X-rays produced in a hot galactic halo.

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