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Magnetic Diffusion in Star Formation
MHD turbulence waves stars formation ISM clouds ISM magnetic fields
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2010/11/10
Magnetic diffusion plays a vital role in star formation. We trace its influence from interstellar cloud scales down to star-disk scales. On both scales, we find that magnetic diffusion can be signific...
p, He, and C to Fe cosmic-ray primary fluxes in diffusion models: Source and transport signatures on fluxes and ratios
Methods statistical – ISM cosmic rays
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2010/11/10
Context. The source spectrum of cosmic rays is not well determined by diffusive shock acceleration models. The prop-agated fluxes of proton, helium, and heavier primary cosmic-ray species (up to Fe) a...
MHD Simulations of Parker Instability Undergoing Cosmic-Ray Diffusion: Effect of the Initial Equilibrium Conditions on Mixing
cosmic rays magnetohydrodynamics instability numerical simulation
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2010/11/9
Parker instability arises from the presence of magnetic fields in a plasma such as the interstellar medium (ISM),wherein the magnetic buoyant pressure expels the gas and causes the gas to move along t...
Simulating Heliospheric and Solar Particle Diffusion using the Parker Spiral Geometry
Simulating Heliospheric Solar Particle Diffusion Parker Spiral Geometry
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2010/11/16
Cosmic Ray transport in curved background magnetic fields is investigated using numerical Monte-Carlo simulation techniques. Special emphasis is laid on the So-lar system, where the curvature of the m...
Ambipolar diffusion in superfluid neutron stars
Solar and Stellar Astrophysics (astro-ph.SR)
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2010/12/24
In this paper we reconsider the problem of magnetic field diffusion in neutron star cores. We model the star as consisting of a mixture of neutrons, protons and electrons, and allow for particle react...
High Energy Cosmic-ray Diffusion in Molecular Clouds: A Numerical Approach
High Energy Astrophysical Phenomena (astro-ph.HE)
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2010/12/22
The propagation of high-energy cosmic rays through giant molecular clouds constitutes a fundamental process in astronomy and astrophysics. The diffusion of cosmic-rays through these magnetically turbu...
High Energy Cosmic-ray Diffusion in Molecular Clouds: A Numerical Approach
High Energy Astrophysical Phenomena (astro-ph.HE)
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2010/12/22
The propagation of high-energy cosmic rays through giant molecular clouds constitutes a fundamental process in astronomy and astrophysics. The diffusion of cosmic-rays through these magnetically turbu...
Atomic t tauri disk winds heated by ambipolar diffusion
Atomic t tauri disk winds ambipolar diffusion
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2009/6/10
Atomic t tauri disk winds heated by ambipolar diffusion。
Chemical Diffusion in Stellar Convective Regions
Chemical Diffusion Stellar Convective Regions
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2009/6/10
Chemical Diffusion in Stellar Convective Regions。
Neutron diffusion and nucleosynthesis in an inhomogeneous big bang model
Neutron diffusion big bang model
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2009/6/8
Neutron diffusion and nucleosynthesis in an inhomogeneous big bang model。