Warm neutral halos around molecular clouds. IV - H I and continuum: Aperture synthesis observations towards the molecular cloud B5
B. G. Andersson, R. S. Roger, P. G. Wannier;
AaA, 1992, 260, 355
ABSTRACT: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.
KEYWORDS: continuous spectra, h i regions, interstellar matter, molecular clouds, radio jets (astronomy), line spectra, radio spectra, synthetic apertures
CODE: andersson92