Physics
Scientific paper
Dec 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989gregr..21.1205l&link_type=abstract
General Relativity and Gravitation, Volume 21, Issue 12, pp.1205-1212
Physics
3
Scientific paper
Given the news functiondot σ of a radiating space-time describing an isolated source, one can construct two physically important functions on the infinite celestial sphere surrounding the source: int_{ - infty }^infty {dot σ dot bar σ dtau } and int_{ - infty }^infty {dot σ dtau (tau = Bondi parameter)} The first describes the energy flux of radiation through the sphere and is the dominant function for high-frequency radiation. The second function contains information about the very low-frequency radiation and dominates at such frequencies. The physical effects of this function are investigated, and it is shown that, even for an arbitrarily small energy flux, it can cause a finite amount of geodesic deviation in the radiation zone. An explicit formula for this deviation is obtained in the case of a bifurcating star in the low-frequency approximation where the energy flux can be neglected.
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