Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.0510v&link_type=abstract
American Astronomical Society, 191st AAS Meeting, #05.10; Bulletin of the American Astronomical Society, Vol. 29, p.1215
Astronomy and Astrophysics
Astronomy
Scientific paper
Radiative transfer is a difficult physical problem because all points in a medium are coupled. Analytic solutions are available only for special geometries and special forms of the interaction between matter and radiation. In order to attack a number of problems dealing with complex geometries and interactions we have begun development of a computer code to follow in detail the propagation of photons through arbitrary media. We provide here a description of our algorithms and comparison of the Monte Carlo results with analytic solutions for several test problems. To demonstrate the potential power of our code, we present simulated near-infrared images of accreting protostars with dense protoplanetary disks, a problem receiving current attention in the literature. The code supports an unbounded spatial dynamic range, allows for arbitrarily geometries, and supports complex interactions bewteen matter and radiation. On a 180 MHz desktop CPU it follows about 1000 photons per second, allowing simulations with up to 10(8) photons to be run, resulting in high fidelity simulated images and spectra. Object-oriented coding practices are used throughout, significantly reducing development effort, improving ease of maintenance and facilitating code re-use.
Brundage Michael
Terebey Susan
van Buren Dale
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