On the origin of the galactic ridge recombination lines |
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Authors: | K R Anantharamaiah |
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Institution: | (1) Raman Research Institute, 560080 Bangalore;(2) Present address: National Radio Astronomy Observatory, VLA, P O Box 0, 87801 Socorro, NM, USA |
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Abstract: | Radio recombination lines are known to be observable at positions along the galactic ridge which are free of discrete continuum
sources. Based on the results of a recent survey of H272α lines it is shown that most of the observed galactic ridge recombination
lines can be explained as emission from outer low-density envelopes of normal Hn regions. The distribution of low-density
ionized gas and discrete HII regions as a function of the distance from the galactic centre is also derived. |
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Keywords: | Galaxy recombination lines galactic ridge HII regions low-density envelopes distribution |
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