搜索结果: 16-30 共查到“天文学 cosmology”相关记录53条 . 查询时间(0.044 秒)
Symmetron Cosmology
Cosmology decoupled screened
2011/10/8
The symmetron is a scalar field associated with the dark sector whose coupling to matter depends on the ambient matter density. The symmetron is decoupled and screened in regions of high density, ther...
Higgs-Dilaton Cosmology: From the Early to the Late Universe
Infl ationary Cosmology Dark Energy Unimodular Gravity Scale Invariance Dilaton Higgs Infl ation
2011/10/18
We consider a minimal scale-invariant extension of the Standard Model of particle physics combined with Unimodular Gravity formulated in \cite{Shaposhnikov:2008xb}. This theory is able to describe not...
This is a brief review of the standard model of cosmology. We first introduce the FRW models and their flat solutions for energy fluids playing an important role in the dynamics at different epochs. W...
Observational test of inflation in loop quantum cosmology
cosmology of theories beyond the SM cosmological perturbation theory quantum cosmology quantum gravity phenomenology
2011/10/18
We study in detail the power spectra of scalar and tensor perturbations generated during inflation in loop quantum cosmology (LQC). After clarifying in a novel quantitative way how inverse-volume corr...
Astrophysics and cosmology with galaxy clusters: the WFXT perspective
Astrophysics cosmology galaxy clusters
2011/1/13
We discuss the central role played by the X-ray study of hot baryons within galaxy clusters to reconstruct the assembly of cosmic structures and to trace the past history of star formation and accret...
In chameleon field theories a scalar field can couple to matter with gravitational strength and still evade local gravity constraints due to a combination of self-interactions and the couplings to mat...
Observational astronomy has shown significant growth over the last decade and has made important contributions to cosmology. A major paradigm shift in cosmology was brought about by observations of Ty...
Real-time Cosmology
Real-time Cosmology
2010/11/15
In recent years the possibility of measuring the temporal change of radial and transverse position of sources in the sky in real time have become conceivable thanks to the thoroughly improved techniqu...
The curvaton scenario in Brane cosmology: model parameters and their constraints
Cosmology Intermediate Inflation Brane Curvaton
2010/11/16
We have studied the curvaton scenario in brane world cosmology in an intermediate inflationary
scenario. This approach has allowed us to find some constraints on different parameters that appear in t...
Inflationary observables in loop quantum cosmology
Cosmology of Theories beyond the SM Loop quantum gravity and cosmology
2010/11/16
The full set of cosmological observables coming from linear scalar and tensor perturbations of loop quantum cosmology is computed in the presence of inverse-volume corrections.
In this article we give a brief review of the fundamental physics that can be done with the future space-based gravitational wave detector LISA. This includes detection of gravitational wave bursts co...
Inflation in Entropic Cosmology: Primordial Perturbations and non-Gaussianities
Inflation Primordial Perturbations non-Gaussianities
2010/11/16
We investigate thermal inflation in double-screen entropic cosmology. We find that its realization is general, resulting from the system evolution from non-equilibrium to equilibrium. Furthermore,goin...
The nature of assembly bias - I. Clues from a LCDM cosmology
cosmology large-scale structure of Universe - cosmology theory -cosmology dark matter - galaxies
2010/11/11
We present a new proxy for the overdensity peak height for which the large-scale clustering of haloes of a given mass does not vary significantly with the assembly history.
Observational constraints on Chaplygin cosmology in a braneworld scenario with induced gravity and curvature effect
Cosmology Dark energy -Cosmology theory- Cosmology Observations
2010/11/16
We study cosmological dynamics and late-time evolution of an extended induced grav-ity braneworld scenario. In this scenario, curvature effects are taken into account via the
Gauss-Bonnet term in the...
Conformal Cosmology and the Pioneer Anomaly
Cosmology and Extragalactic Astrophysics (astro-ph.CO) General Relativity and Quantum Cosmology (gr-qc)
2011/1/6
We review the fundamental results of a new cosmological model, based on conformal gravity, and apply them to the analysis of the early data of the Pioneer anomaly. We show that our conformal cosmology...