Other
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mcdg.proc..221w&link_type=abstract
The Magellanic Clouds and Other Dwarf Galaxies, Proceedings of the Bonn/Bochum-Graduiertenkolleg Workshop, held at the Physikzen
Other
Hot Interstellar Medium, X-Rays
Scientific paper
We present a multi-wavelength study of the Violent Interstellar Medium of the nearby dwarf galaxy IC 2574, a member of the M81 group of galaxies. In particular, we concentrate on the most prominent supergiant shell in IC 2574 which was detected in neutral hydrogen (H I) observations obtained with the Very Large Array (VLA). This shell is thought to be produced by the combined effects of stellar winds and supernova explosions. Massive star forming regions, as traced by Hα emission, are situated predominantly on the rim of this H I shell. This supports the view that the accumulated H I on the rim has reached densities which are high enough for secondary star formation to commence. Soft X-ray emission from within the H I hole is detected by a pointed ROSAT PSPC observation. The emission is extended and has the same size and orientation as the H I shell. These spatial properties together with a first-order spectral analysis suggest that the emission is generated by an X-ray emitting plasma located within the H I shell. However, a contribution from X-ray binaries cannot be completely ruled out at this point.
Brinks Elias
Duric Neb
Kerp Juergen
Klein Ulf
Walter Fabian
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