Browse > Article
http://dx.doi.org/10.5303/PKAS.2010.25.4.177

AN EFFICIENT MONTE-CARLO ALGORITHM FOR DUST-SCATTERING STUDY  

Seon, Kwang-Il (Korea Astronomy and Space Science Institute)
Publication Information
Publications of The Korean Astronomical Society / v.25, no.4, 2010 , pp. 177-186 More about this Journal
Abstract
We developed an efficient Monte-Carlo algorithm to solve dust-scattering radiative transfer problems for continuum radiation. The method calculates the scattered intensities for various anisotropic factors ($g_i$) all at once, while actual photon packets are tracked following a scattering phase function given by a single anisotropic factor ($g_0$). The algorithm was tested by applying the method to a dust cloud embedding a star at the cloud center and found to provide accurate results within the statistical fluctuation that is intrinsic in Monte-Carlo simulations. It was found that adopting $g_0$ = 0.4 - 0.5 in the algorithm is most efficient. The method would be efficient in estimating the anisotropic factor of the interstellar dust by comparing the observed data with radiative transfer models.
Keywords
dust; extinction; methods; numerical; radiative transfer;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Witt, A. N., Schild, R. E., & Kraiman, J. B., 1984, Photometric Study of NGC 2023 in the 3500 $\AA$ to 10000 $\AA$ Region-Confirmation of a Near-IR Emission Process in Reflection Nebulae, ApJ, 281, 708   DOI
2 Yusef-Zadeh, F., Morris, M., & White, R. L., 1984, Bipolar Reflection Nebulae: Monte Carlo Simulations, ApJ, 278, 186   DOI
3 선광일, 2009, 복사전달 문제의 몬테카를로 해법, 천문학논총, 14, 23
4 Bianchi, S., Ferrara, A., & Giovanardi, C., 1996, Monte Carlo Simulations of Dusty Spiral Galaxies: Extinction and Polarization Properties, ApJ, 465, 127   DOI
5 Draine, B. T., 2003, Scattering by Interstellar Dust Grains. I. Optical and Ultraviolet, ApJ, 598, 1017   DOI
6 Gordon, K., Missel, K. A., Witt, A. N., & Clayton, G. C., 2001, The DIRTY Model. I. Monte Carlo Radiative Transfer through Dust, ApJ, 551, 269   DOI
7 Sujatha, N. V., Shalima, P., Murthy, J., & Henry, R. C., 2005, Dust Properties in the Far-Ultraviolet in Ophiuchus, ApJ, 633, 257   DOI
8 Gordon, K., 2004, Interstellar Dust Scattering Properties, in Astrophysics of Dust (Eds. Adolf N. Witt, Geoffrey C. Clayton & Bruce T. Draine), ASP Conference Series, 309, 77
9 Henyey, L. G. & Greenstein, J. L., 1941, Diffuse Radiation in the Galaxy, ApJ, 93, 70   DOI
10 Juvela, M., 2005, Efficient Monte Carlo Methods for Continuum Radiative Transfer, A&A, 440, 531   DOI   ScienceOn
11 Witt, A. N., 1977a, Multiple Scattering in Reflection Nebulae. I. A Monte Carlo Approach, ApJS, 35, 1   DOI
12 Witt, A. N., 1977b, Multiple Scattering in Reflection Nebulae. III. Nebulae with Embedded Illuminating Stars, ApJS, 35, 21   DOI