منابع مشابه
Cosmic Strings and Structure Formation
We discuss structure formation in cosmic string theories. Emphasis is laid on the properties of the peculiar velocity field, non–gaussian features and clusters of galaxies. It is found that the predicted peculiar velocity field is quiet (v < 150 km/s for L > 30h Mpc) for models with (Ω0h ≤ 0.2) which is in disagreement with the results from POTENT at large scales (> 30h Mpc), consistent, howeve...
متن کاملFormation and Evolution of Cosmic D-strings
We study the formation of D and F -cosmic strings in D-brane annihilation after brane inflation. We show that D-string formation by quantum de Sitter fluctuations is severely suppressed, due to suppression of RR field fluctuations in compact dimensions. We discuss the resonant mechanism of production of D and F -strings, which are formed as magnetic and electric flux tubes of the two orthogonal...
متن کاملGalaxy formation spanning cosmic history
Over the past several decades, galaxy formation theory has met with significant successes. In order to test current theories thoroughly we require predictions for as yet unprobed regimes. To this end, we describe a new implementation of the GALFORM semi-analytic model of galaxy formation. Our motivation is the success of the model described by Bower et al. in explaining many aspects of galaxy f...
متن کاملCosmic Strings and Cosmic Supertrings
In these lectures, I review the current status of cosmic strings and cosmic superstrings. I first discuss topological defects in the context of Grand Unified Theories, focusing in particular in cosmic strings arising as gauge theory solitons. I discuss the reconciliation between cosmic strings and cosmological inflation, I review cosmic strings dynamics, cosmic string thermodynamics and cosmic ...
متن کاملCosmic Strings & Cosmic Variance
By using a simple analytical model based on counting random multiple impulses inflicted on photons by a network of cosmic strings we show how to construct the general q-point temperature correlation function of the Cosmic Microwave Background radiation. Our analysis is sensible specially for large angular scales where the Kaiser-Stebbins effect is dominant. Then we concentrate our study on the ...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1988
ISSN: 0074-1809
DOI: 10.1017/s0074180900136150