Statistics – Computation
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...404..686n&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 404, no. 2, p. 686-695.
Statistics
Computation
27
Astronomical Models, Computational Fluid Dynamics, Hydrodynamics, Radiative Transfer, Relativistic Effects, Numerical Integration, Relativity
Scientific paper
Relativistic radiative transfer in spherical flows is considered. We discuss the general properties of radiative transfer and hydrodynamical equations, derived in the framework of PSTF moment formalism. Particular emphasis is placed on the analysis of those aspects of the formalism, such as the choice of boundary conditions, directly connected with applications to real astrophysical models. A numerical code for the solution of relativistic, nongray transfer was developed and successfully tested. We present and discuss the results obtained for some specific models, static atmosphere, and converging flows in a Schwarzschild spacetime, in which gravity and/or dynamics is known to affect the emergent radiation spectrum significantly. Our method proves to be a viable tool for the solution of transfer problems in spherical symmetry and allows a correct treatment of situations in which strong gravitational fields and dynamics play an important role.
Nobili Luciano
Turolla Roberto
Zampieri Luca
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