• On the origin of the galactic ridge recombination lines

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    • Keywords


      Galaxy; recombination lines; galactic ridge; HII regions; low-density envelopes; distribution

    • 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.

    • Author Affiliations


      K. R. Anantharamaiah1 2

      1. Raman Research Institute, Bangalore - 560080
      2. National Radio Astronomy Observatory, VLA, P O Box 0, Socorro, NM - 87801, USA
    • Dates

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