搜索结果: 1-15 共查到“天体物理学 Scale”相关记录38条 . 查询时间(0.084 秒)
Gamma-Ray and Parsec-Scale Jet Properties of a Complete Sample of Blazars From the MOJAVE Program
Gamma-Ray Parsec-Scale Jet Properties Complete Sample Blazars From MOJAVE Program
2011/10/19
We investigate the Fermi LAT gamma-ray and 15 GHz VLBA radio properties of a joint gamma-ray- and radio-selected sample of AGNs obtained during the first 11 months of the Fermi mission (2008 Aug 4 - 2...
Large-scale magnetic field generation via the Kelvin-Helmholtz instability
Large-scale magnetic field generation Kelvin-Helmholtz instability
2011/10/18
We present the first self-consistent three-dimensional particle-in-cell simulations of the Kelvin-Helmholtz instability (KHI) in an unmagnetized scenario. We discuss the main features, including densi...
Determination of a magnetization parameter of the parsec-scale AGN jets
Determination magnetization parameter parsec-scale AGN jets
2011/9/27
The observed shift of the core of the relativistic AGN jets as a function of frequency allows us to evaluate the number density of outflowing plasma and, hence, the magnetization parameter. New analys...
Large-scale radio nebula around the Ultra-Luminous X-ray Source IC 342 X-1
Large-scale radio nebula the Ultra-Luminous X-ray Source IC 342 X-1
2011/1/10
We present discovery of a radio nebula associated with the ultraluminous X-ray source (ULX) IC 342 X-1 using the Very Large Array (VLA). Taking the surrounding nebula as a calorimeter, one can constra...
Large-Scale Gas Dynamics in the Adhesion Model: Implications for the Two-Phase Massive Galaxy Formation Scenario
the Adhesion Model Implications the Two-Phase Massive Galaxy Formation Scenario
2011/1/13
The mass assembly and star formation histories of massive galaxies identified at low redshift z in different cosmological hydrodynamical simulations, have been studied through a detailed follow-up ba...
Modeling of the subgrid-scale term of the filtered magnetic field transport equation
the subgrid-scale term the filtered magnetic field
2011/1/11
Accurate subgrid-scale turbulence models are needed to perform realistic numerical magnetohydrodynamic (MHD) simulations of the subsurface flows of the Sun. To perform large-eddy simulations (LES) of ...
The Evolution of the Large-scale ISM: Bubbles, Superbubbles and Non-Equilibrium Ionization
the Large-scale ISM Bubbles Superbubbles
2011/1/11
The ISM, powered by SNe, is turbulent and permeated by a magnetic field (with a mean and a turbulent component). It constitutes a frothy medium that is mostly out of equilibrium and is ram pressure do...
The Signatures of Large-scale Temperature Fluctuations in the Lyman-alpha Forest
Large-scale Temperature Fluctuations the Lyman-alpha Forest
2011/1/11
It appears inevitable that reionization processes would have produced large-scale temperature fluctuations in the intergalactic medium. Using toy temperature models and detailed heating histories in c...
Using the magnetohydrodynamic (MHD) description, we develop a nonlinear dynamo model that couples the evolution of the large scale magnetic field with turbulent dynamics of the plasma at small scale b...
Light WIMP Searches: The Effect of the Uncertainty in Recoil Energy Scale and Quenching Factor
Light WIMP Searches Recoil Energy Scale
2011/1/11
Taking liquid xenon detectors as a case study, the importance of a robust recoil energy calibration as a prerequisite to a search for light-mass Weakly Interacting Massive Particles (WIMPs) is emphasi...
Particle Production of Vector Fields: Scale Invariance is Attractive
Particle Production of Vector Fields Scale Invariance
2010/11/16
In a model of an Abelian vector boson with a Maxwell kinetic term and non-negative mass-squared
it is demonstrated that, under fairly general conditions, a scale-invariant spectrum of perturbations f...
The influence of inhomogeneities on the large-scale expansion of the universe
influence of inhomogeneities large-scale expansion of the universe
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 ...
Large Scale Structures in Kinetic Gravity Braiding Model
Large Scale Structures Kinetic Gravity Braiding Model
2010/11/12
We study cosmological consequences of a kinetic braiding model, which is proposed as an alternative to the dark energy model. The kinetic braiding model we study is characterised by a parameter n, whi...
Effects of large-scale structure on the accuracy of weak lensing mass measurements
cosmology observations dark matter large-scale structure of Uni-verse galaxies clusters
2010/11/10
Weak gravitational lensing has become an important method to determine the masses of galaxy clusters. The intrinsic shapes of the galaxies are a dominant source of uncertainty, but there are other lim...
The evolution of the large-scale emission in FRI jets
galaxies jets–hydrodynamics–galaxies evolution–X-rays galaxies–gamma-rays galaxies–radio continuum galaxies
2010/11/11
Recent observations in X-rays and gamma-rays of nearby FRI radio galaxies have raised the question of the origin of the emission detected in the termination structures of their jets. The study of thes...