The origin of scattering in the inner Galaxy

Details The origin of scattering in the inner Galaxy The origin of scattering in the inner Galaxy

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aipc..174..185a&link_type=abstract

IN: Radio wave scattering in the interstellar medium; Proceedings of the AIP Conference, San Diego, CA, Jan. 18, 19, 1988 (A89-2

Physics

11

Electron Density (Concentration), Galactic Nuclei, H Ii Regions, Radio Scattering, Interstellar Matter, Power Spectra, Pulsars, Scintillation

Scientific paper

It is argued that the enhanced scattering of radiowaves observed at low Galactic longitude and latitude is caused by the low-density outer envelopes of H II regions in the inner 8 kpc of the Galaxy. A simple phenomenological theory is developed to estimate the strength of density fluctuations in a turbulent medium and apply the theory to the H II envelopes, using the densities and sizes determined from a recent 325-MHz recombination-line survey. The predicted values are in good agreement with the observations.

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