Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-11-30
Astrophys.J.551:277-293,2001
Astronomy and Astrophysics
Astrophysics
23 pages (emulateapj, single column), 17 figures. To appear in the ApJ, in press
Scientific paper
10.1086/320083
In this paper and a companion paper we present the DIRTY model, a Monte Carlo radiative transfer code, self-consistently including dust heating and emission, and accounting for the effects of the transient heating of small grains. The code is completely general; the density structure of the dust, the number and type of heating sources, and their geometric configurations can be specified arbitrarily within the model space. Source photons are tracked through the scattering and absorbing medium using Monte Carlo techniques and the effects of multiple scattering are included. The dust scattering, absorbing, and emitting properties are calculated from realistic dust models derived by fitting observed extinction curves in Local Group galaxies including the Magellanic Clouds and the Milky Way. The dust temperature and the emitted dust spectrum are calculated self consistently from the absorbed energy including the effects of temperature fluctuations in small grains. Dust self-absorption is also accounted for, allowing the treatment of high optical depths, by treating photons emitted by the dust as an additional heating source and adopting an iterative radiative transfer scheme. As an illustrative case, we apply the DIRTY radiative transfer code to starburst galaxies wherein the heating sources are derived from stellar evolutionary synthesis models. Within the context of the starburst model, we examine the dependence of the UV to FIR SED, dust temperatures, and dust masses predicted by DIRTY on variations of the input parameters.
Clayton Geoff C.
Gordon Karl Douglas
Misselt Karl A.
Wolff Mike J.
No associations
LandOfFree
The DIRTY Model II: Self-Consistent Treatment of Dust Heating and Emission in a 3-D Radiative Transfer Code does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The DIRTY Model II: Self-Consistent Treatment of Dust Heating and Emission in a 3-D Radiative Transfer Code, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The DIRTY Model II: Self-Consistent Treatment of Dust Heating and Emission in a 3-D Radiative Transfer Code will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-249342