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Title:
The decrease with time of the radio flux of the Crab Nebula
Authors:
Aller, H. D.; Reynolds, S. P.
Affiliation:
AA(Radio Astronomy Observatory, Ann Arbor, MI), AB(National Radio Astronomy Observatory, Charlottesville, VA)
Publication:
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 293, June 15, 1985, p. L73-L75. (ApJL Homepage)
Publication Date:
06/1985
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
CRAB NEBULA, DECAY RATES, PULSARS, RADIANT FLUX DENSITY, ORION NEBULA, SUPERNOVA REMNANTS, TIME RESPONSE
DOI:
10.1086/184494
Bibliographic Code:
1985ApJ...293L..73A

Abstract

Observations of the Crab Nebula at 8.0 GHz over the period 1968 - 1984 show a secular decrease in the flux density at a rate of -0.167%±0.015% yr-1. This observed value is in good quantitative agreement with the rate predicted by a theoretical model for the evolution of the Crab Nebula. The authors discuss inferences that can be made about the characteristic pulsar slowdown time scales in Crab-like remnants.

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Physics
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