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Matching RadiationDominated and MatterDominated Einsteinde Sitter Universes and an Application for Primordial Black Holes in Evolving Cosmological Backgrounds
, 2006
"... Abstract By matching across a surface of constant time, it is demonstrated that the spacetime for a radiationdominated Einsteinde Sitter universe can be directly matched to the spacetime for a matterdominated Einsteinde Sitter universe. Thus, this can serve as a model of a universe filled with ..."
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Abstract By matching across a surface of constant time, it is demonstrated that the spacetime for a radiationdominated Einsteinde Sitter universe can be directly matched to the spacetime for a matterdominated Einsteinde Sitter universe. Thus, this can serve as a model of a universe filled
An australian telescope survey for cmb anisotropies
 MNRAS
, 2000
"... Today, we are fairly confident that the large scale structure grew out of primordial seed perturbations by gravitational instabilites in a dark matter dominated universe. The physics that dominates the coupling between matter inhomogeneities ..."
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Cited by 6 (1 self)
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Today, we are fairly confident that the large scale structure grew out of primordial seed perturbations by gravitational instabilites in a dark matter dominated universe. The physics that dominates the coupling between matter inhomogeneities
Nonlinear Stochastic Galaxy Biasing in Cosmological Simulations
, 1999
"... The standard picture of the growth of structure via gravitational instability within a darkmatter dominated universe has led to a successful and predictive theoretical framework. However, in order to make direct contact with most observations, ..."
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Cited by 1 (0 self)
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The standard picture of the growth of structure via gravitational instability within a darkmatter dominated universe has led to a successful and predictive theoretical framework. However, in order to make direct contact with most observations,
CP Violation and the Dominance of Matter
"... The observable Universe reveals a clear dominance of matter over antimatter. If this asymmetry is consistent with the Universe as a whole, then a contradiction arises between observation and any naïve formulation of Big Bang theory. CP violation, violation of the combined C (charge conjugation) and ..."
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) and P (parity) operators, is one of three necessary conditions of matter dominance theorized by Sakharov in 1967. Therefore, further study of CP violation is warranted to determine its role in the evolution of a matterdominated Universe. There are two ways by which violation might occur: direct
Cosmological Implication of Antisymmetric Tensor Field on Dbrane
, 2006
"... We discuss cosmological implications of antisymmetric tensor field when it experiences a kind of “Higgs mechanism ” including nonlocal interaction terms on Dbranes. Even when a huge magnetic condensation inducing anisotropy was assumed in the early universe, the expansion of the universe leads to t ..."
UTEXASHEP9914 Holographic Bound in BransDicke Cosmology
, 1999
"... We apply the holographic principle to the BransDicke cosmology. We analyze the holographic bound in both the Jordan and Einstein frames. The holographic bound is satisfied for both the k = 0 and k = −1 universe, but it is violated for the k = 1 matter dominated universe. ..."
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We apply the holographic principle to the BransDicke cosmology. We analyze the holographic bound in both the Jordan and Einstein frames. The holographic bound is satisfied for both the k = 0 and k = −1 universe, but it is violated for the k = 1 matter dominated universe.
Holographic Bound in BransDicke Cosmology
, 1999
"... We apply the holographic principle to the BransDicke cosmology. We analyze the holographic bound in both the Jordan and Einstein frames. The holographic bound is satisfied for both the k = 0 and k = −1 universe, but it is violated for the k = 1 matter dominated universe. ..."
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We apply the holographic principle to the BransDicke cosmology. We analyze the holographic bound in both the Jordan and Einstein frames. The holographic bound is satisfied for both the k = 0 and k = −1 universe, but it is violated for the k = 1 matter dominated universe.
Constraining a matterdominated cosmological model with bulk viscosity proportional to the
, 810
"... We present and constrain a cosmological model where the only component is a pressureless fluid with bulk viscosity as an explanation for the present accelerated expansion of the universe. We study the particular model of a bulk viscosity coefficient proportional to the Hubble parameter: ζm = ζH, whe ..."
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We present and constrain a cosmological model where the only component is a pressureless fluid with bulk viscosity as an explanation for the present accelerated expansion of the universe. We study the particular model of a bulk viscosity coefficient proportional to the Hubble parameter: ζm = ζ
and
, 2008
"... New exact inflationary solutions are presented in the scalar field theory, minimally coupled to gravity, with a potential term. No use is made of the slow rollover approximation. The scale factors are completely nonsingular and the transition from the inflationary phase to the deccelerating phase is ..."
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is smooth. Moreover, in one of these models, asymptotically one has transition to the matter dominated Universe.
Acceleration of the universe in the Einstein frame of a metricaffine f(R) gravity
, 2005
"... Abstract. We show that inflation and current cosmic acceleration can be generated by a metricaffine f(R) gravity formulated in the Einstein (physical) conformal frame, if the gravitational Lagrangian L(R) contains both positive and negative powers of the curvature scalar R. In this frame, we give e ..."
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explicit differential formulae for the expansion of the homogeneous and isotropic matterdominated universe, in the case L(R) = R + R3 β2 − α2
Results 11  20
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1,085