We present a new dust extension to the Monte Carlo radiative transfer code CRASH, which enables it to simulate the propagation of ionizing radiation through mixtures of gas and dust. The newcode is applied to study the impact of dust absorption on idealized galacticHII regions and on small-scale reionization. We find that HII regions are reduced in size by the presence of dust, while their inner temperature and ionization structure remain largely unaffected. In the small-scale reionization simulation, dust hardens ionization fronts and delays the overlap of ionized bubbles. This effect is found to depend only weakly on the assumed abundance of dust in underdense regions.

Radiative transfer of ionizing radiation through gas and dust: The stellar source case / Glatzle, M.; Ciardi, B.; Graziani, L.. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - ISSN 0035-8711. - 482:1(2019), pp. 321-336. [10.1093/mnras/sty2514]

Radiative transfer of ionizing radiation through gas and dust: The stellar source case

Graziani L.
Secondo
Writing – Original Draft Preparation
2019

Abstract

We present a new dust extension to the Monte Carlo radiative transfer code CRASH, which enables it to simulate the propagation of ionizing radiation through mixtures of gas and dust. The newcode is applied to study the impact of dust absorption on idealized galacticHII regions and on small-scale reionization. We find that HII regions are reduced in size by the presence of dust, while their inner temperature and ionization structure remain largely unaffected. In the small-scale reionization simulation, dust hardens ionization fronts and delays the overlap of ionized bubbles. This effect is found to depend only weakly on the assumed abundance of dust in underdense regions.
2019
Dark ages; Dust, extinction; First stars; Radiative transfer; Reionization
01 Pubblicazione su rivista::01a Articolo in rivista
Radiative transfer of ionizing radiation through gas and dust: The stellar source case / Glatzle, M.; Ciardi, B.; Graziani, L.. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - ISSN 0035-8711. - 482:1(2019), pp. 321-336. [10.1093/mnras/sty2514]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1286194
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