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Rational Approximation Formula for Chandrasekhar's H-function for Isotropic Scattering
Rational Approximation Formula Chandrasekhar's H-function
2011/1/10
We first establish a simple procedure to obtain with 11-figure accuracy the values of Chandrasekhar's H-function for isotropic scattering using a closed-form integral representation and the Gauss-Lege...
Relaxing the Small Particle Approximation for Dust-grain opacities in Carbon-star Wind Models
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/23
We have computed wind models with time-dependent dust formation and grain-size dependent opacities, where (1) the problem is simplified by assuming a fixed dust-grain size, and where (2) the radiation...
The Validity of the Super-Particle Approximation during Planetesimal Formation
planet formation planetesimals N-body simulations convergence accretion disc
2010/3/8
The formation mechanism of planetesimals in protoplanetary discs is hotly debated. Currently, the favoured model involves the accumulation of meter-sized objects within a turbulent disc, followed by a...
Low-eccentricity orbits for the case of a spherically symmetric potential
are studied. The Lindblad approximation concerning nearly circular orbits
is treated. It is shown that this approximation is...