Accession Number : AD0434038

Title :   OBSERVATIONS OF THE OWENS VALLEY RADIO OBSERVATORY. THE SPECTRA OF NON-THERMAL RADIO SOURCES,

Corporate Author : CALIFORNIA INST OF TECH PASADENA

Personal Author(s) : Kellermann,Kenneth I.

Report Date : 1944

Pagination or Media Count : 33

Abstract : The spectra of most non-thermal sources can be closely represented by a simple power law at least between 40 and 1400 Mc/s. The distribution of spectral indices for the sources away from the galactic plane is sharply peaked about a median value of -0.76, while the sources near the plane have a considerably wider dispersion of indices. The small-diameter, relatively weak sources tend to have relatively flat spectra. The most luminous sources, with high surface brightnesses, have normal spectra at decimeter wavelengths but are considerably flatter at meter wavelengths, suggesting that they are younger sources where equilibrium between the rate of injection of relativistic electrons and the rate of radiation loss has not yet been established. (Author)

Descriptors :   (*EXTRATERRESTRIAL RADIO WAVES, DETECTION), LINE SPECTRA, DISTRIBUTION, DENSITY, MAGNETIC FIELDS, TABLES(DATA), RADIO ASTRONOMY

Distribution Statement : APPROVED FOR PUBLIC RELEASE