Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rftu.proc..367b&link_type=abstract
International Conference on X-ray Astronomy and Astrophysics: Röntgenstrahlung from the Universe, p. 367 - 368
Astronomy and Astrophysics
Astrophysics
X Rays: Spiral Galaxies, X Rays: Galaxy, X Rays: Star Formation
Scientific paper
The authors report on a new model to explain diffuse soft X-ray emission from the disk and halo in spiral galaxies. It is based on the observational fact of an active disk-halo interaction, driven by star formation activity in the gaseous disk. The non-equilibrium cooling of fast adiabatically expanding gas leads to a distinct signature in the X-ray emission, which is dominated by delayed recombination of highly ionized species and line emission. Thus the soft X-ray background of the Galaxy, measured by the WISCONSIN-Survey and the ROSAT-PSPC, can be successfully modelled. The proposed mechanism should also be applicable to the observed X-ray halo of the edge-on spiral NGC 4631.
Breitschwerdt Dieter
Schmutzler Thomas
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