Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976phla...61..371n&link_type=abstract
Physics Letters, vol. 61B, Apr. 12, 1976, p. 371-374.
Astronomy and Astrophysics
Astronomy
8
Absorption, Black Holes (Astronomy), Scalars, Astronomical Models, Reflectance, Schwarzschild Metric, Wave Equations
Scientific paper
The absorption of a quantum particle represented as a massive scalar field by a Reisner-Nordstrom black hole is investigated by observing how a certain reflection coefficient of the scalar wave changes in various cases. The radial wave equation in the Reisner-Nordstrom geometry is obtained from the wave equation for a charged scalar field, and it is shown that the reflection coefficient depends on the ratio of the Schwarzschild radius to the Compton wavelength. The absorption and reflection of a spherical wave by a small black hole is analyzed. It is found that the wave will be almost completely reflected in the low-energy case when the Schwarzschild radius is much less than the Compton wavelength and that almost total absorption occurs in the high-energy limit. It is also found that the wave will be amplified when the level-crossing condition is satisfied.
Nakamura Takashi
Sato Haruo
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