Topological defects in an open universe
نویسندگان
چکیده
منابع مشابه
Cosmic microwave anisotropies from topological defects in an open universe.
We present a general formalism for computing Cosmic Background Radiation (CBR) and density uctuations in open models with stii sources. We decompose both the metric uctuations and the uctuations in the stress-energy tensor into scalar, vector and tensor modes. We nd analytic Green's functions for the linearized Einstein equations in the presence of stii sources and use this formalism to estimat...
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This talk will explore the evolution of topological defects in an open universe. The rapid expansion of the universe in an open model slows defects and suppresses the generation of CBR fluctuations at large angular scale as does the altered relationship between angle and length in an open universe. Defect models, when normalized to COBE in an open universe, predict a galaxy power spectrum consi...
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Alexander Vilenkin Institute of Cosmology, Department of Physics and Astronomy, Tufts University, Medford, MA 02155, USA Topological defects can naturally be formed soon after bubble nucleation in the open inflation scenario. The defects are not completely diluted away by the subsequent period of inflation in the bubble interior and can produce observable large-scale microwave background anisot...
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Topological defects, in particular cosmic strings, give rise to an interesting mechanism for generating the primordial perturbations in the early Universe which are required to explain the present structure. An overview of the cosmic string model will be given, focusing on the predictions of the theory for the large-scale structure of the Universe and for cosmic microwave background anisotropies.
متن کاملFormation of multiple winding topological defects in the early universe
The formation probability of multiple winding topological defects is calculated by phase and flux distribution analysis based on the Kibble mechanism. The core size of defects is taken into account so that when it is much larger than the correlation length of the Higgs field, high winding configuration can be realized. For example, if the self coupling constant of the Higgs field is smaller tha...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 1994
ISSN: 0920-5632
DOI: 10.1016/0920-5632(94)90215-1