Beecroft Institute for Particle Astrophysics and Cosmology

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Galaxy Modelling -- I. Spectral Energy Distributions from Far-UV to Sub-mm Wavelengths

(1999)

Authors:

JEG Devriendt, B Guiderdoni, R Sadat
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Time-Independent Gravitational Fields in the BGK Scheme for Hydrodynamics

ArXiv astro-ph/9905247 (1999)

Authors:

Adrianne Slyz, Kevin H Prendergast

Abstract:

We incorporate a time-independent gravitational field into the BGK scheme for numerical hydrodynamics. In the BGK scheme the gas evolves via an approximation to the collisional Boltzmann equation, namely the Bhatnagar-Gross-Krook (BGK) equation. Time-dependent hydrodynamical fluxes are computed from local solutions of the BGK equation. By accounting for particle collisions, the fundamental mechanism for generating dissipation in gas flow, a scheme based on the BGK equation gives solutions to the Navier-Stokes equations: the fluxes carry both advective and dissipative terms. We perform numerical experiments in both 1D Cartesian geometries and axisymmetric cylindrical coordinates.
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Time-Independent Gravitational Fields in the BGK Scheme for Hydrodynamics

(1999)

Authors:

Adrianne Slyz, Kevin H Prendergast
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Measuring Omega with Galaxy Streaming Velocities

(1999)

Authors:

PG Ferreira, M Davis, HA Feldman, AH Jaffe, R Juszkiewicz
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The 4 Year COBE DMR data is non-Gaussian

(1999)

Authors:

PG Ferreira, KM Gorski, J Magueijo
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