Electromagnetic self-force on a static charge in Schwarzschild-de Sitter spacetimes
| Autor: | Kuchar, Joseph, Poisson, Eric, Vega, Ian |
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| Rok vydání: | 2013 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/0264-9381/30/23/235033 |
| Popis: | We compute the self-force acting on an electric charge at rest in Schwarzschild-de Sitter spacetimes, allowing the cosmological constant to be either positive or negative. In the case of a positive cosmological constant, we show that the self-force is always positive, representing a repulsion from the black hole, and monotonically decreasing with increasing distance from the black hole. The spectrum of results is richer in the case of a negative cosmological constant. Here the self-force is not always positive --- it is negative when the black-hole and cosmological scales are comparable and the charge is close to the black hole --- and not always monotonically decreasing --- it is actually monotonically increasing when the cosmological scale is sufficiently small compared to the black-hole scale. The self-force also approaches a constant asymptotic value when the charge is moved to large cosmological distances; this feature can be explained in terms of an interaction between the charge and the conformal boundary at infinity, which acts as a grounded conductor. Comment: 13 pages, 3 figures |
| Databáze: | arXiv |
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