Hydrogen-line absorption observations of distant pulsars

Details Hydrogen-line absorption observations of distant pulsars Hydrogen-line absorption observations of distant pulsars

Jul 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976a%26a....50..177a&link_type=abstract

Astronomy and Astrophysics, vol. 50, no. 2, July 1976, p. 177-184.

Astronomy and Astrophysics

Astronomy

59

Electron Density Profiles, H Lines, Microwave Emission, Pulsars, Absorption Spectra, Galactic Structure, Line Spectra, Radio Astronomy

Scientific paper

Spectral-line observations at the frequency of the 1420 MHz neutral hydrogen line have been made in the direction of nine pulsars, all lying at galactic latitudes less than 10 degrees and having relatively high dispersion measures. Significant absorption was detected for seven of these pulsars and kinematic distances were derived on the basis of these results. These results are consistent with a mean electron density in the local region between 0.02 and 0.03 per cu cm, but indicate higher electron densities in the Sagittarius arm and lower densities in interarm regions. Average clumping factors for the diffuse medium within the local and Sagittarius arms are of the order of 10.

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