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Testing the isotropy of high energy cosmic rays using spherical needlets
Testing isotropy high energy cosmic rays using spherical
2011/10/14
For many decades, ultra-high energy charged particles have been a puzzle for particle physicists and astrophysicists. Nor the sites of production, nor the mechanism responsible for the generation of t...
CMB radiation in an inhomogeneous spherical space
CMB radiation in an inhomogeneous spherical space
2011/10/20
We analyse the CMB radiation in spherical 3-spaces with non-trivial topology. The focus is put on an inhomogeneous space which possesses observer dependent CMB properties. The suppression of the CMB a...
Weak-field limit of Kaluza-Klein models with spherical compactification II: agreement with the observations
Weak-field limit Kaluza-Klein models spherical compactification agreement observations
2011/10/17
We investigate the classical gravitational tests for the Kaluza-Klein model with spherical (of a radius $a$) compactification of the internal space. The model contains also a bare cosmological constan...
Weak-field limit of Kaluza-Klein models with spherical compactification I: problematic aspects
Weak-field limit Kaluza-Klein models spherical compactification problematic aspects
2011/10/17
We investigate classical gravitational tests for the Kaluza-Klein model with spherical compactification of the internal two-dimensional space. In the case of the absence of a multidimensional bare cos...
Angular momentum in cluster Spherical Collapse Model
cosmology: large scale structure – galaxies: clusters: general – galaxies: kine-matics and dynamics
2011/10/8
Our new formulation of the Spherical Collapse Model (SCM-L) takes into account the presence of angular momentum associated with the motion of galaxy groups infalling towards the centre of galaxy clust...
We describe an algorithm for computing an inverse spherical harmonic transform suitable for graphic processing units (GPU). We use CUDA and base our implementation on a Fortran90 routine included in ...
A law of motion for spherical shells in special relativity
Relativistic fluid dynamics；Relativistic plasmas
2010/11/15
Self-similar solutions to the problem of a special relativistic law of motion for thin shells of matter are calculated. These solutions represent the special relativistic generalization of momentum co...
Cold uniform spherical collapse revisited
N-body simulations virialization spherical collapse
2010/11/10
We report results of a study of the Newtonian dynamics of N self-gravitating particles which start in a quasiuniform spherical configuration, without initial velocities.
Spherical and non-spherical bubbles in cosmological phase transitions
Cosmology and Extragalactic Astrophysics (astro-ph.CO) High Energy Physics - Phenomenology (hep-ph)
2010/12/28
The cosmological remnants of a first-order phase transition generally depend on the perturbations that the walls of expanding bubbles originate in the plasma. Several of the formation mechanisms occur...
Libpsht - algorithms for efficient spherical harmonic transforms
Instrumentation and Methods for Astrophysics (astro-ph.IM) Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/28
Libpsht (or "library for Performant Spherical Harmonic Transforms") is a collection of algorithms for efficient conversion between spatial-domain and spectral-domain representations of data defined on...
Reynolds stress and heat flux in spherical shell convection
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/27
Turbulent fluxes of angular momentum and heat due to rotationally affected convection play a key role in determining differential rotation of stars.
A new multi-dimensional general relativistic neutrino hydrodynamics code for core-collapse supernovae. I. Method and code tests in spherical symmetry
general relativistic core-collapse supernovae neutrino hydrodynamics code
2010/3/19
We present a new general relativistic (GR) code for hydrodynamic supernova simulations with neutrino transport in spherical and azimuthal symmetry (1D/2D). The code is a combination of the CoCoNuT hyd...
Structural Properties of Spherical Galaxies: a Semi-Analytical Approach
Spherical Galaxies Semi-Analytical Approach
2009/6/18
Structural Properties of Spherical Galaxies：a Semi-Analytical Approach。
An Enigmatic, Expanding, Spherical Bubble Ejected from a Young Stellar Object
Young Stellar Object Enigmatic Expanding Spherical Bubble Ejected
2009/6/15
An Enigmatic, Expanding, Spherical Bubble Ejected from a Young Stellar Object。
A COMPARSION OF TWO SPHERICAL MASS DISTRIBUTION MODELS
MASS DISTRIBUTION MODELS Two spherically symmetric generalised isochrone model
2009/3/13
Two spherically symmetric mass-distribution models - a special
case of the generalised Schuster density law and the generalised isochrone model
(both yield the same approximate density dependence on...