Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ncimb..64..367d&link_type=abstract
Nuovo Cimento B, Serie 11, vol. 64B, Aug. 11, 1981, p. 367-382.
Astronomy and Astrophysics
Astronomy
Black Holes (Astronomy), Frequency Shift, Luminous Intensity, Schwarzschild Metric, Cosmology, Geometry, Red Shift
Scientific paper
The frequency shifts and intensities of optical objects apparent to an observer within the event horizon of a Schwarzschild black hole are examined in detail. The patterns and intensities of the redshifts and blueshifts seen by an observer in a radial trajectory making observations in a local Lorentz frame within an empty cosmology of the Kantowski-Sachs class are simulated by the determination of the luminosity distances of the sources from the observer by means of a standard candles approach. Redshifts and luminosity distances for each direction on the observer's past null cone are illustrated for several positions on the inward journey. It is found that the blueshifts appear in directions transverse to observer motion, while redshifts are always seen in directions towards or away from the black-hole center. In addition, in the general direction of the black-hole center, the observer would erroneously conclude that the higher redshifts must come from either closer or more intense sources.
Debney George
Farnsworth Damon
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