Neutral and charged matter in equilibrium with black holes
- Center for Gravitation and Fundamental Metrology, VNIIMS, 46 Ozyornaya Street, Moscow 119361 (Russian Federation) and Institute of Gravitation and Cosmology, PFUR, 6 Miklukho-Maklaya Street, Moscow 117198 (Russian Federation)
We study the conditions of a possible static equilibrium between spherically symmetric, electrically charged or neutral black holes and ambient matter. The following kinds of matter are considered: (1) neutral and charged matter with a linear equation of state p{sub r}=w{rho} (for neutral matter the results of our previous work are reproduced), (2) neutral and charged matter with p{sub r}{approx}{rho}{sup m}, m>1, and (3) the possible presence of a ''vacuum fluid'' (the cosmological constant or, more generally, anything that satisfies the equality T{sub 0}{sup 0}=T{sub 1}{sup 1} at least at the horizon). We find a number of new cases of such an equilibrium, including those generalizing the well-known Majumdar-Papapetrou conditions for charged dust. It turns out, in particular, that ultraextremal black holes cannot be in equilibrium with any matter in the absence of a vacuum fluid; meanwhile, matter with w>0, if it is properly charged, can surround an extremal charged black hole.
- OSTI ID:
- 21607897
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 84, Issue 8; Other Information: DOI: 10.1103/PhysRevD.84.084013; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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