http://www.maik.ru/abstract/asteng/6/asteng0601_abstract.pdf

 

Magnetic Tunnels (Wormholes) in Astrophysics
N. S. Kardashev, I. D. Novikov, and A. A. Shatskii
Astro Space Center, Lebedev Physical Institute, Russian Academy of Sciences,
Profsoyuznaya ul. 84/32, Moscow, 117810 Russia
Received February 12, 2005; in final form, February 6, 2006
Abstract—We consider models of a wormhole (i) maintained by an electromagnetic field, takingi nto
account quantum vacuum corrections to the equation of state, (ii) maintained by a combination of the
magnetic field and phantom energy, with a spherically symmetrical equation of state, and (iii) with a
magnetic field and phantom matter with an anisotropic equation of state. It is shown that the quantum
corrections and the density and exoticity of phantom energy or matter can be as small as is desired. For an
external observer, the entrance to the tunnel appears to be a magnetic monopole of macroscopic size. The
accretion of ordinarymatter onto the entrance to the tunnelmay result in the formation of a black hole with a
radial magnetic field.We consider the possibility that some active galactic nuclei and Galactic objects may
be current or former entrances to magnetic wormholes.We consider the possible existence of a broad mass
spectrum for wormholes, from several billion solar masses to masses of the order of 2 kg. The Hawking
effect (evaporation) does not operate in such objects due to the absence of a horizon, makingit possible for
them to be retained over cosmological time intervals, even if their masses are smaller than 1015 g . We also
discuss a model for a binary system formed by the entrances of tunnels with magnetic fields, which could
be sources of nonthermal radiation and γ-ray bursts.
PACS numbers : 98.80.Jk
DOI: 10.1134/S1063772906080014