2005/04/27 by D. Semionov, Semionov, D., V. Vansevičius +2
Engineering · Physics and Astronomy · #Astrophysics (astro-ph) #Calibration and Measurement Techniques #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Radiative Heat Transfer Studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0504613
10 pages, 7 figures, published in Baltic Astronomy; text and figures revised
openalex publication_date 2005/04/27 · arxiv created 2005/08/02 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We investigate the effects of multiple anisotropic light scattering by interstellar dust particles on photometric profiles of disk galaxy models computed using an iterative ray-tracing radiative transfer modeling code. It is shown that anisotropic scattering must be fully accounted for in at least the first scattering event for all considered cases. At the same time scattering terms of the order higher than 5th can be safely approximated using the isotropic phase function. The effects of isotropic approximation are most significant in the galaxy models seen face-on with dust population extending beyond the stellar disk, therefore the applicability of isotropic approximation to a higher-order (2 to 5) scattering terms depends on the assumed galaxy model parameters, namely, the optical depth, scattering albedo and the distribution of interstellar dust with respect to stars.