Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...260..355a&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 260, no. 1-2, p. 355-369.
Astronomy and Astrophysics
Astronomy
20
Continuous Spectra, H I Regions, Interstellar Matter, Molecular Clouds, Radio Jets (Astronomy), Line Spectra, Radio Spectra, Synthetic Apertures
Scientific paper
We present aperture synthesis observations of H I (21 cm) line radiation and continuum emission at 408 and 1420 MHz towards a field centered on the molecular cloud B5. The H I emission shows an extended atomic halo around the molecular cloud. The opacity of the halo is derived using H I absorption toward several background sources and a simple source model is presented. The model indicates that the halo is not gravitationally bound to the molecular cloud and that it is in fact expanding away from it. Approximately 350 solar masses are contained in the H I halo. Flux densities and spectral indices for the sources detected in both of the continuum bands are given.
Andersson Bengt-Goran
Roger Robert S.
Wannier Peter G.
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