Dust and gas modelling in radiative transfer simulations of disc-dominated galaxies with RADMC-3D

[2412.08609] Dust and gas modelling in radiative transfer simulations of disc-dominated galaxies with RADMC-3D Skip to main content Search Submit Donate Log in Search arXiv Press Enter to search · Advanced search Astrophysics > Astrophysics of Galaxies arXiv:2412.08609 (astro-ph) [Submitted on 11 Dec 2024 ( v1 ), last revised 14 Apr 2026 (this version, v2)] Title: Dust and gas modelling in radiative transfer simulations of disc-dominated galaxies with RADMC-3D Authors: Francesco Sinigaglia , Miroslava Dessauges-Zavadsky , Lucio Mayer , Pedro R. Capelo , Valentina Tamburello View a PDF of the paper titled Dust and gas modelling in radiative transfer simulations of disc-dominated galaxies with RADMC-3D, by Francesco Sinigaglia and 4 other authors View PDF HTML (experimental) Abstract: Bridging theory and observations is a key task to understand galaxy formation and evolution. With the advent of state-of-the-art observational facilities, an accurate modelling of galaxy observables through radiative transfer simulations coupled to hydrodynamic simulations of galaxy formation must be performed. We present a novel pipeline, dubbed RTGen, based on the Monte Carlo radiative transfer code RADMC-3D , and explore the impact of the physical assumptions and modelling of dust and gas phases on the resulting galaxy observables. In particular, we address the impact of the dust abundance, composition, and grain size, as well as model the atomic-to-molecular transition and study the resulting emission from molecular gas. We apply Monte Carlo radiative transfer a posteriori to determine the dust temperature in six different hydrodynamic simulations of isolated galaxies. Afterwards, we apply ray tracing to compute the spectral energy distribution, as well as continuum images and spectral line profiles. We find our pipeline to predict accurate spectral energy distribution distributions of the studied galaxies, as well as continuum and CO luminosity images, in good agreement with literature results from both observations and theoretical studies. In particular, we find the dust modelling to have an important impact on the convergence of the resulting predicted galaxy observables, and that an adequate modelling of dust grains composition and size is required. We conclude that our novel framework is ready to perform high-accuracy studies of the observables of the ISM, reaching few tens percent convergence under the studied baseline configuration. This will enable robust studies of galaxy formation, and in particular of the nature of massive clumps in high-redshift galaxies, through the generation of mock images mimicking observations from state-of-the-art facilities such as JWST and ALMA. Comments: Accepted for publication in A&A. 27 pages, 26 figures, 2 tables Subjects: Astrophysics of Galaxies (astro-ph.GA) Cite as: arXiv:2412.08609 [astro-ph.GA] (or arXiv:2412.08609v2 [astro-ph.GA] for this version) https://doi.org/10.48550/arXiv.2412.08609 Focus to learn more arXiv-issued DOI via DataCite Journal reference: A&A 696, A107 (2025) Related DOI : https://doi.org/10.1051/0004-6361/202453404 Focus to learn more DOI(s) linking to related resources Submission history From: Francesco Sinigaglia [ view email ] [v1] Wed, 11 Dec 2024 18:34:07 UTC (43,127 KB) [v2] Tue, 14 Apr 2026 10:22:29 UTC (44,311 KB) Full-text links: Access Paper: View a PDF of the paper titled Dust and gas modelling in radiative transfer simulations of disc-dominated galaxies with RADMC-3D, by Francesco Sinigaglia and 4 other authors View PDF HTML (experimental) TeX Source view license Current browse context: astro-ph.GA < prev | next > new | recent | 2024-12 Change to browse by: astro-ph References & Citations NASA ADS Google Scholar Semantic Scholar export BibTeX citation Loading... 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