Diffusion models for the low-frequency radio emission from the Galactic halo

Details Diffusion models for the low-frequency radio emission from the Galactic halo Diffusion models for the low-frequency radio emission from the Galactic halo

Nov 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977mnras.181..311s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 181, Nov. 1977, p. 311-322.

Astronomy and Astrophysics

Astrophysics

27

Diffuse Radiation, Galactic Radiation, Halos, Radio Emission, Astronomical Models, Astrophysics, Low Frequencies

Scientific paper

The low-frequency drift-scan observations of the Galactic radio emission at high latitudes are discussed in the context of simple diffusion-plus-energy-loss models for the propagation of electrons away from the Galactic plane. It is shown that for certain parameters such models can reproduce the observations quite well. The halo emissivity in the region just outside the disk at the solar radius is approximately 7000 K/kpc at 17.5 MHz. The average magnetic field in the halo must be about 0.2 of that in the disk, and the diffusion mean free path about 1 pc. The full width at half-maximum of the 17.5 MHz emission is about 6 kpc.

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