搜索结果: 91-105 共查到“理学 universe”相关记录197条 . 查询时间(0.093 秒)
Do we live in the universe successively dominated by matter and antimatter?
matter and antimatter universe
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2011/8/30
We wonder if a cyclic universe may be dominated alternatively by matter and antimatter. Such a scenario demands a mechanism for transformation of matter to antimatter (or antimatter to matter) during ...
Semi-Holographic Universe
Semi-Holographic Universe
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2011/1/13
By assuming that a dark component (dark energy) in the universe strictly obeys the holographic principle, that is, its entropy is one fourth of the apparent horizon, we find that the existence of the...
The cosmological constant and the relaxed universe
The cosmological constant the relaxed universe
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2011/1/13
We study the role of the cosmological constant (CC) as a component of dark energy (DE). It is argued that the cosmological term is in general unavoidable and it should not be ignored even when dynami...
One-loop quantum gravity repulsion in the early Universe
One-loop quantum gravity the early Universe
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2010/12/27
Perturbative quantum gravity is used to compute the lowest order corrections to the classical spatially flat cosmological FLRW solution (for the radiation). The presented approach is analogous to the...
Non-gaussianities and the Stimulated creation of quanta in the inflationary universe
Non-gaussianities the Stimulated creation
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2011/1/11
Cosmological inflation generates a spectrum of density perturbations that can seed the cosmic structures we observe today. These perturbations are usually computed as the result of the gravitationally...
Dynamics of the Magellanic Clouds in a LCDM Universe
Dynamics the Magellanic Clouds
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2011/1/10
We examine Milky Way-Magellanic Cloud systems selected from the Millennium-II Simulation in order to place the orbits of the Magellanic Clouds in a cosmological context. Our analysis shows that satell...
On Isotropic Turbulence in the Dark Fluid Universe
Isotropic Turbulence Dark Fluid Universe
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2010/12/24
As first part of this work, experimental information about the decay of isotropic turbulence in ordinary hydrodynamics, u^2(t) proportional to t^{-6/5}, is used as input in FRW equations in order to i...
On A Cosmological Invariant as an Observational Probe in the Early Universe
Cosmological Invariant Observational Probe
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2011/1/11
k-essence scalar field models are usually taken to have lagrangians of the form ${\mathcal L}=-V(\phi)F(X)$ with $F$ some general function of $X=\nabla_{\mu}\phi\nabla^{\mu}\phi$. Under certain condit...
Inflation of Bianchi type-$\Rmnum{7}_0$ Universe with Dirac Field in Einstein-Cartan theory
Universe Dirac Field Einstein-Cartan theory
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2010/12/23
We discuss the Bianchi type-$\Rmnum{7}_0$ cosmology with Dirac field in Einstein-Cartan theory. We obtain the equations of Dirac field and gravitational field in Einstein-Cartan theory. We find a Bian...
The $\cal{P}$-Parity Odd Universe, Dark Energy and QCD
Odd Universe Dark Energy QCD
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2010/12/27
Cosmological observations on the largest scales exhibit a solid record of unexpected anomalies and alignments, apparently pointing towards a large scale violation of statistical isotropy. These inclu...
The influence of inhomogeneities on the large-scale expansion of the universe
the large-scale expansion universe
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2010/12/27
The evolution of an inhomogeneous universe composed entirely of matter is followed from an early, nearly uniform state until the time when the inhomogeneities have begun to grow large. The particular...
Penrose claims to have glimpsed universe before Big Bang（图）
Penrose universe Big Bang
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2010/11/30
Circular patterns within the cosmic microwave background suggest that space and time did not come into being at the Big Bang but that our universe in fact continually cycles through a series of "aeons...
Smooth Beginning of the Universe
singularities dark energy dark mater
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2010/12/20
Institute of Physics, Pedagogical University, ul. Podchorazych 2, Cracow,Poland, and Copernicus Center for Interdisciplinary Studies, ul. Slawkowska 17, Cracow, Poland
Genesis and evolution of dust in galaxies in the early Universe I. Modeling dust evolution in starburst galaxies
galaxies high-redshift – galaxies starburst – galaxies evolution – ISM evolution – quasars general – stars massive
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2010/11/16
Aims. The aim is to elucidate the astrophysical conditions required for generating large amounts of dust in massive starburst galaxies at high redshift.
The influence of inhomogeneities on the large-scale expansion of the universe
influence of inhomogeneities large-scale expansion of the universe
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2010/11/12
The evolution of an inhomogeneous universe composed entirely of matter is followed from an early, nearly uniform state until the time when the inhomogeneities have begun to grow large. The particular ...