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The galactic distribution of free electrons

Nature volume 354, pages 121124 (14 November 1991) | Download Citation

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Abstract

Dispersion, distance and scattering measurements of pulsars and other radio sources are now sufficiently numerous to allow modelling of the entire galactic distribution of free electrons. A two-component axisymmetric model of local electron density, fitted on all scales from 100 km to a few parsecs, accounts for most of the data; a population of dense, discrete clouds is also needed, and there is some evidence for spiral structure.

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Author information

Affiliations

  1. Astronomy Department and NAIC, Cornell University, Ithaca, New York 14853, USA

    • J. M. Cordes
  2. Department of Physics and Astronomy, Carleton College, Northfield, Minnesota 55057, USA

    • J. M. Weisberg
  3. National Radio Astronomy Observatory, Socorro, New Mexico 87801, USA

    • D. A. Frail
  4. Department of Physics and Astronomy, University of Iowa, Iowa City, Iowa 52242, USA

    • S. R. Spangler
  5. Department of Physics, Cornell University, Ithaca, New York 14853, USA

    • M. Ryan

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https://doi.org/10.1038/354121a0

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