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Modelling the cosmological Lyman–Werner background radiation field in the early Universe
dc.creator | Incatasciato, Andrea | es |
dc.creator | Khochfar, Sadegh | es |
dc.creator | Oñorbe Bernis, José | es |
dc.date.accessioned | 2024-05-20T14:57:14Z | |
dc.date.available | 2024-05-20T14:57:14Z | |
dc.date.issued | 2023 | |
dc.identifier.citation | Incatasciato, A., Khochfar, S. y Oñorbe Bernis, J. (2023). Modelling the cosmological Lyman–Werner background radiation field in the early Universe. Monthly Notices of the Royal Astronomical Society, 522 (1), 330-349. https://doi.org/10.1093/mnras/stad1008. | |
dc.identifier.issn | 0035-8711 | es |
dc.identifier.issn | 1365-2966 | es |
dc.identifier.uri | https://hdl.handle.net/11441/158693 | |
dc.description.abstract | The Lyman–Werner (LW) radiation field is a key ingredient in the chemothermal evolution of gas in the early Universe, as it dissociates H2 molecules, the primary cooling channel in an environment devoid of metals and dust. Despite its important role, it is still not implemented in cosmological simulations on a regular basis, in contrast to the ionizing UV background. This is in part due to uncertainty in the source modelling, their spectra and abundance, as well as the detailed physics involved in the propagation of the photons and their interactions with the molecules. The goal of this work is to produce an accurate model of the LW radiation field at z ≥ 6, by post-processing the physics-rich high-resolution FiBY simulation. Our novelties include updated cross-sections for H2, H− and H+2 chemical species, IGM absorption by neutral Hydrogen and various spectral models for Population III and Population II stars. With our fiducial set of parameters, we show that the mean LW intensity steadily increases by three orders of magnitude from z ∼ 23 to z ∼ 6, while spatial inhomogeneities originate from massive star-forming galaxies that dominate the photon budget up to a distance of ∼100 proper kpc. Our model can be easily applied to other simulations or semi-analytical models as an external radiation field that regulates the formation of stars and massive black hole seeds in high-z low-mass haloes. | es |
dc.format | application/pdf | es |
dc.format.extent | 20 p. | es |
dc.language.iso | eng | es |
dc.publisher | Oxford University Press | es |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society, 522 (1), 330-349. | |
dc.rights | Atribución 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | * |
dc.subject | Astrochemistry | es |
dc.subject | Early Universe | es |
dc.subject | Methods: numerical | es |
dc.subject | Molecular processes | es |
dc.subject | Radiative transfer | es |
dc.subject | Stars: Population III | es |
dc.title | Modelling the cosmological Lyman–Werner background radiation field in the early Universe | es |
dc.type | info:eu-repo/semantics/article | es |
dc.type.version | info:eu-repo/semantics/publishedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear | es |
dc.relation.publisherversion | https://doi.org/10.1093/mnras/stad1008 | es |
dc.identifier.doi | 10.1093/mnras/stad1008 | es |
dc.journaltitle | Monthly Notices of the Royal Astronomical Society | es |
dc.publication.volumen | 522 | es |
dc.publication.issue | 1 | es |
dc.publication.initialPage | 330 | es |
dc.publication.endPage | 349 | es |
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