DUSTiER (DUST in the Epoch of Reionization): dusty galaxies in cosmological radiation-hydrodynamical simulations of the Epoch of Reionization with RAMSES-CUDATON
In recent years, interstellar dust has become a crucial topic in the study of the high redshift Universe. Evidence points to the existence of large dust masses in massive star forming galaxies already during the Epoch of Reionization, potentially affecting the escape of ionizing photons into the int...
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| Hauptverfasser: | , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2023 January 11
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| In: |
Monthly notices of the Royal Astronomical Society
Year: 2023, Jahrgang: 519, Heft: 4, Pages: 5987-6007 |
| ISSN: | 1365-2966 |
| DOI: | 10.1093/mnras/stad081 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1093/mnras/stad081
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| Verfasserangaben: | Joseph S.W. Lewis, Pierre Ocvirk, Yohan Dubois, Dominique Aubert, Jonathan Chardin, Nicolas Gillet and Émilie Thélie |
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| 245 | 1 | 0 | |a DUSTiER (DUST in the Epoch of Reionization) |b dusty galaxies in cosmological radiation-hydrodynamical simulations of the Epoch of Reionization with RAMSES-CUDATON |c Joseph S.W. Lewis, Pierre Ocvirk, Yohan Dubois, Dominique Aubert, Jonathan Chardin, Nicolas Gillet and Émilie Thélie |
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| 520 | |a In recent years, interstellar dust has become a crucial topic in the study of the high redshift Universe. Evidence points to the existence of large dust masses in massive star forming galaxies already during the Epoch of Reionization, potentially affecting the escape of ionizing photons into the intergalactic medium. Moreover, correctly estimating dust extinction at UV wavelengths is essential for precise ultra-violet luminosity function (UVLF) prediction and interpretation. In this paper, we investigate the impact of dust on the observed properties of high redshift galaxies, and cosmic reionization. To this end, we couple a physical model for dust production to the fully coupled radiation-hydrodynamics cosmological simulation code RAMSES-CUDATON, and perform a 16 cMpc3 h−3, 20483, simulation, that we call DUSTiER for DUST in the Epoch of Reionization. It yields galaxies with dust masses and UV slopes roughly compatible with constraints at z ≥5. We find that extinction has a dramatic impact on the bright end of the UVLF, even as early as z=8, and our dusty UVLFs are in better agreement with observations than dust-less UVLFs. The fraction of obscured star formation rises up to 45 per cent at z=5, consistent with some of the latest results from ALMA. Finally, we find that dust reduces the escape of ionizing photons from galaxies more massive than 1010 M⊙ (brighter than ≈ −18 MAB1600) by >10 per cent, and possibly up to 80-90 per cent for our most massive galaxies. Nevertheless, we find that the ionizing escape fraction is first and foremost set by neutral Hydrogen in galaxies, as the latter produces transmissions up to 100 times smaller than through dust alone. | ||
| 700 | 1 | |a Ocvirk, Pierre |e VerfasserIn |4 aut | |
| 700 | 1 | |a Dubois, Yohan |e VerfasserIn |4 aut | |
| 700 | 1 | |a Aubert, Dominique |e VerfasserIn |4 aut | |
| 700 | 1 | |a Chardin, Jonathan |e VerfasserIn |4 aut | |
| 700 | 1 | |a Gillet, Nicolas |e VerfasserIn |4 aut | |
| 700 | 1 | |a Thélie, Émilie |e VerfasserIn |4 aut | |
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