منابع مشابه
Black Holes with Zero Mass
We consider the spacetimes corresponding to static Global Monopoles with interior boundaries corresponding to a Black Hole Horizon and analyze the behavior of the appropriate ADM mass as a function of the horizon radius rH . We find that for small enough rH , this mass is negative as in the case of the regular global monopoles, but that for large enough rH the mass becomes positive encountering...
متن کاملZero temperature black holes in semiclassical gravity
The semiclassical Einstein equations are solved to first order in ǫ = h̄/M for the case of an extreme or nearly extreme Reissner-Nordström black hole perturbed by the vacuum stress-energy of quantized free fields. It is shown that, for realistic fields of spin 0, 1/2, or 1, any zero temperature black hole solution to the equations must have an event horizon at rh < |Q|, with Q the charge of the ...
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In all 2d theories of gravity a conservation law connects the effective (space-time dependent) ADM mass at all times and all radii with an integral of the matter fields. It depends on an arbitrary constant which may be interpreted as determining the initial value together with the initial values for the matter field. We discuss this for spherically reduced Einstein-gravity in a diagonal metric ...
متن کاملZero and near-zero temperature black holes in semiclassical gravity
The semiclassical Einstein equations are solved to first order in ǫ = h̄/M for the case of an extreme or nearly extreme Reissner-Nordström black hole perturbed by the vacuum stress-energy of quantized free fields. It is shown that the perturbed solution at first order is not unique; there exists a sequence of solutions with varying values of the position of the event horizon, rh. The smaller the...
متن کاملDo semiclassical zero temperature black holes exist?
The semiclassical Einstein equations are solved to first order in epsilon = Planck's over 2pi/M2 for the case of a Reissner-Nordström black hole perturbed by the vacuum stress energy of quantized free fields. Massless and massive fields of spin 0, 1/2, and 1 are considered. We show that in all physically realistic cases, macroscopic zero temperature black hole solutions do not exist. Any static...
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ژورنال
عنوان ژورنال: Journal of Modern Physics
سال: 2016
ISSN: 2153-1196,2153-120X
DOI: 10.4236/jmp.2016.711124