Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...120...15x&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 120, no. 1, April 1983, p. 15-20.
Astronomy and Astrophysics
Astrophysics
2
Gravitational Lenses, Neutrinos, Particle Trajectories, Quasars, Cosmology, Transparence
Scientific paper
In this paper, the neutrino astronomical objects (NAO) are discussed as transparent gravitational lenses. The trajectory of a light ray emitted from the source which is located either outside or inside the transparent isotropic astronomical object is obtained by means of the solution of the geodesic equations. (If the source tends to infinity, the trajectory corresponds to the ordinary deflection of light by the Sun.) Furthermore, the brightness amplification ratio K is derived from the redistribution of intensity due to the gravitational lens effects. The amplification K is computed in the metric of a star of uniform density. K can reach a value of five hundred under some conditions. Finally, it is suggested that some quasars may be the sources in the neutrino astronomical objects.
Wu Xiaolin
Xu Cenke
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