Results 11 to 20 of about 15,594 (146)
Considerations in the Interpretation of Cosmological Anomalies [PDF]
, 2014 Anomalies drive scientific discovery -- they are associated with the cutting edge of the research frontier, and thus typically exploit data in the low signal-to-noise regime.
Peiris, Hiranya V.
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Evolution of thin-wall configurations of texture matter [PDF]
, 1999 We consider the free matter of global textures within the framework of the perfect fluid approximation in general relativity. We examine thermodynamical properties of texture matter in comparison with radiation fluid and bubble matter.
A. Vilenkin +15 more
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Expansion, Geometry, and Gravity [PDF]
, 2004 In general-relativistic cosmological models, the expansion history, matter content, and geometry are closely intertwined. In this brief paper, we clarify the distinction between the effects of geometry and expansion history on the luminosity distance. We
Benoit A +12 more
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Cosmic defects and cosmology [PDF]
, 2000 We provide a pedagogical overview of defect models of structure formation. We first introduce the concept of topological defect, and describe how to classify them.
Brandenberger, Robert, Magueijo, Joao
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Texture zeros of low-energy Majorana neutrino mass matrix in 3+1 scheme [PDF]
, 2017 In this work we revisit the zero textures in low energy Majorana neutrino mass matrix when the active neutrino sector is extended by a light sterile neutrino in the eV scale i.e., the 3+1 scheme.
Borah, Debasish +3 more
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O(4) texture with a cosmological constant [PDF]
Physical Review D, 2002 We investigate O(4) textures in a background with a positive cosmological constant. We find static solutions which co-move with the expanding background. There exists a solution in which the scalar field is regular at the horizon. This solution has a noninteger winding number smaller than one.
openaire +2 more sources
Primordial non-Gaussianity and Bispectrum Measurements in the Cosmic Microwave Background and Large-Scale Structure [PDF]
, 2010 The most direct probe of non-Gaussian initial conditions has come from bispectrum measurements of temperature fluctuations in the Cosmic Microwave Background and of the matter and galaxy distribution at large scales.
Fergusson, J. R. +3 more
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Unraveling critical dynamics: The formation and evolution of topological textures [PDF]
, 1999 We study the formation of topological textures in a nonequilibrium phase transition of an overdamped classical O(3) model in 2+1 dimensions. The phase transition is triggered through an external, time-dependent effective mass, parameterized by quench ...
A. A. Belavin +44 more
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Topological Defects and Cosmology [PDF]
, 1998 Many particle physics models of matter admit solutions corresponding to stable or long-lived topological defects. In the context of standard cosmology it is then unavoidable that such defects will form during phase transitions in the very early Universe.
A Abrikosov +99 more
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The Astrophysical Journal, 1991 Hydrodynamical simulations of galaxy formation in a texture-seeded cosmology are presented, with attention given to Omega = 1 galaxies dominated by both hot dark matter (HDM) and cold dark matter (CDM). The simulations include both gravitational and hydrodynamical physics with a detailed treatment of collisional and radiative thermal processes, and use
R. Y. Cen +3 more
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