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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...
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...
SPHERICAL TRIGONOMETRY OF THE PROJECTED BASELINE ANGLE
Methods analytical-Techniques interferometric-Reference systems
2009/2/8
The basic vector geometry of a stellar interferometer with two
telescopes is de¯ned by the right triangle of (i) the baseline vector between the
telescopes, of (ii) the delay vector which point...