Small-scale H I structure and the soft X-ray background
K. Jahoda, D. McCammon, F. J. Lockman;
ApJ, 1986, 311, L57
ABSTRACT: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 is extended to 10 arcmin
spatial resolution.
The results confirm conclusions from preliminary work
at coarser resolution, and, in combination with other data, appear to
rule out, on any angular scale, the hypothesis that clumping of neutral
interstellar matter 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.
KEYWORDS: density distribution, diffuse radiation, hydrogen clouds, radiant flux density, radio spectra, x ray sources, absorption spectra, angular resolution, astronomical spectroscopy, centimeter waves, interstellar matter, milky way galaxy
PERSOKEY:h_i, 21 cm, xrays, ,
CODE: jahoda86