搜索结果: 1-15 共查到“知识库 运动宇宙学 the Universe”相关记录22条 . 查询时间(0.49 秒)
Dark Energy and Fate of the Universe
Dark Energy Fate Universe negative redshifts
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2012/2/21
We explore the ultimate fate of the Universe by using a divergence-free parametrization for dark energy $w(z)=w_0+w_a({\ln (2+z)\over 1+z}-\ln2)$. Unlike the CPL parametrization, this parametrization ...
The geometric characteristics of the universe
cosmology
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2011/9/26
A new kinematics cosmological model that base on
Diversity in the Phoenix Universe
Diversity Phoenix Universe
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2011/10/17
It has recently been argued by Copeland et al. that in eleven dimensions two orbifold planes can collide and bounce in a regular way, even when the bulk metric is perturbed away from Milne spacetime t...
Who discovered the expanding universe?
discovered expanding universe
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2011/10/18
Who discovered the expanding universe? Was it Hubble, or Lemaitre, or was it just the end result of a long series of investigations? In this article we summarise the main steps and contributions that ...
Do baryons trace dark matter in the early universe?
baryons trace matter early universe
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2011/9/30
Baryon-density perturbations of large amplitude may exist if they are compensated by dark-matter perturbations so that the total density remains unchanged. Big-bang nucleosynthesis and galaxy clusters...
Dynamical vs spectator models of (pseudo-)conformal Universe
Dynamical spectator models (pseudo-)conformal Universe
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2011/10/18
We discuss two versions of the conformal scenario for generating scalar cosmological perturbations: a spectator version with a scalar field conformally coupled to gravity and carrying negligible energ...
General conditions for scale-invariant perturbations in an expanding universe
General conditions scale-invariant perturbations expanding universe
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2011/9/29
We investigate the general properties of expanding cosmological models which generate scale-invariant curvature perturbations in the presence of a variable speed of sound. We show that in an expanding...
The dark matter assembly of the Local Group in constrained cosmological simulations of a LambdaCDM universe
galaxies: haloes cosmology: theory methods: N-body simulations
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2011/9/26
We make detailed theoretical predictions for the assembly properties of the Local Group (LG) in the standard LambdaCDM cosmological model. We use three cosmological N-body dark matter simulations from...
Energy in an Expanding Universe in the Teleparallel Geometry
Gravitation teleparallelism gravitational energy- momentum tensor
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2010/6/30
The main purpose of this paper is to explicitly verify the consistency of the energy-momentum and angular momentum tensor of the gravitational field established in the Hamiltonian structure of the Tel...
Gravitational Charged Perfect Fluid Collapse in Friedmann Universe Models
Electric field Gravitational collapse Cosmological constant Friedmann models
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2010/3/18
This paper is devoted to study the gravitational charged perfect fluid collapse in the Friedmann universe models with cosmological constant. For this purpose, we assume that the electromagnetic field ...
Geometry of the quantum universe
causal dynamical triangulation
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2010/3/19
A universe much like the (Euclidean) de Sitter space-time appears as background geometry in the causal dynamical triangulation (CDT) regularization of quantum gravity. We study the geometry of such un...
The Holographic Universe
Holographic Universe quantum field theory
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2010/3/19
We present a holographic description of four-dimensional single-scalar inflationary universes in terms of a three-dimensional quantum field theory. The holographic description correctly reproduces sta...
EMIR：Using GRBs to probe the high redshift Universe
high redshift Universe EMIR
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2009/6/12
EMIR：Using GRBs to probe the high redshift Universe。
Luminous Blue Variables in the local universe
Luminous Blue Variables local universe
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2009/6/12
Luminous Blue Variables in the local universe。
Reionization of the universe and the photoevaporation of cosmological minihalos
cosmological minihalos hotoevaporation Reionization
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2009/6/5
Reionization of the universe and the photoevaporation of cosmological minihalos。