Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...239..305l&link_type=abstract
Astrophysical Journal, Part 1, vol. 239, July 1, 1980, p. 305-309.
Astronomy and Astrophysics
Astrophysics
1
Gravitational Lenses, Relativistic Effects, Rotating Matter, Astrophysics, Mass Distribution, Spheres, Stellar Gravitation
Scientific paper
Null rays emitted inside a relativistic, spherical mass can, depending on the location of the emission point, emerge in highly focused patterns. In order to increase the realism of this result, slow rotation of the mass is allowed. The effect of this on the focusing is complex and variable. Depending on the location of the emission point, the effect of the rotation may be nil, the beam direction may be shifted in the direction of the rotation, the radiation pattern may be stretched in the direction opposite to the rotation, or the beams may be defocused by an amount proportional to the specific angular momentum.
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