منابع مشابه
Modelling the Dynamics of Global Monopoles
A thin wall approximation is exploited to describe a global monopole coupled to gravity. The core is modelled by de Sitter space; its boundary by a thin wall with a constant energy density; its exterior by the asymptotic Schwarzschild solution with negative gravitational mass M and solid angle deficit, ∆Ω/4π = 8πGη2, where η is the symmetry breaking scale. The deficit angle equals 4π when η = 1...
متن کاملStatic Gravitational Global Monopoles
Topological defects have attracted quite a bit of attention because of their relevance to a number of different areas ranging from condensed matter to structure formation. Studies of global monopoles in particular have served as a foundation on which knowledge of other defects has been built. Previous work details static gravitating global monopole solutions [1,2], while further studies conside...
متن کاملDynamics of gravitating magnetic monopoles.
According to previous work on magnetic monopoles, static regular solutions are nonexistent if the vacuum expectation value of the Higgs eld is larger than a critical value cr, which is of the order of the Planck mass. In order to understand the properties of monopoles for > cr, we investigate their dynamics numerically and classify those dynamical solutions into three types as follows. If is la...
متن کاملGlobal Monopoles in Dilaton Gravity
We analyse the gravitational field of a global monopole within the context of low energy string gravity, allowing for an arbitrary coupling of the monopole fields to the dilaton. Both massive and massless dilatons are considered. We find that, for a massless dilaton, the spacetime is generically singular, whereas when the dilaton is massive, the monopole generically induces a long range dilaton...
متن کاملCritical Phenomena Inside Global Monopoles
Quite an industry has developed around the study of nonlinear phenomena occurring at the threshold of black hole formation first discovered by Choptuik [1]. A number of reviews detail the substantial progress in understanding these phenomena [2,3]. By specifying a form of initial data parameterized by some parameter p, numerical evolutions can determine whether the value of p is sufficient to f...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1998
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.58.063502