Radiative Transfer in a Dusty Medium

Details Radiative Transfer in a Dusty Medium Radiative Transfer in a Dusty Medium

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005tmgm.meet.1404p&link_type=abstract

The Tenth Marcel Grossmann Meeting. Proceedings of the MG10 Meeting held at Brazilian Center for Research in Physics (CBPF), Rio

Physics

Scientific paper

I review the basic features of a time-dependent radiative transfer code recently developed by Perna & Lazzati (2002). The code combines self-consistently metal evolution and dust destruction under an intense X-ray UV radiation field. The evolution of dust grains is computed with the inclusion of the processes of sublimation and ion field emission (IFE). The relative importance of IFE with respect to X-ray and UV sublimation as a function of grain size, intensity and hardness of the incident spectrum is discussed. The code also follows the evolution of the ionization states of the metals and their relative radiative transitions. It treats, self-consistently, the gradual recycling of metals into gas as dust is sublimated away; it allows for any initial dust grain distribution and follows its evolution in space and time. An application of this code to Gamma-Ray Bursts is discussed, and it is shown how the time variability of the low-energy and high-energy opacities can yield powerful clues on the characteristics of the medium in which the bursts occur.

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