Distribution of galactic synchrotron emission. I
S. Phillipps, S. Kearsey, J. L. Osborne, C. G. T. Haslam, H. Stoffel;
AaA, 1981, 98, 286
ABSTRACT:The distribution of synchrotron emissivity in the galactic plane is
derived from the all-sky radio continuum map at 408 MHz of Haslam et
al.
(1981).
An unfolding technique is used in which the plane is divided into
logarithmic spiral sections of equal radial variation in emissivity, allowing the
radial and azimuthal distributions to be determined separately.
A best fit
to the data is obtained for a spiral pitch angle of 12 deg, while equally
good fits were obtained for power-law and exponential variations in
emissivity.
Data is consistent with a magnetic field configuration with equal regular
and irregular components, and a spiral pattern extending to within 20 deg
of the galactic center.
The sun is found to lie between major spiral arms
near a local emissivity minimum consistent with estimates of the local
magnetic field.
KEYWORDS: galactic radio waves, galactic structure, milky way galaxy, radiation distribution, synchrotron radiation, azimuth, emissivity, interstellar magnetic fields, iterative solution
PERSOKEY:radio continuum, h+, synchrotron, milky way, ,
CODE: phillipps81