Contribution of the first galaxies to the cosmic far-infrared/sub-millimeter background - I. Mean background level

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We study the contribution of the first galaxies to the far-infrared/sub-millimeter (FIR/sub-mm) extragalactic background light (EBL) by implementing an analytical model for dust emission. We explore different dust models, assuming different grain-size distributions and chemical compositions. Accordi...

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Autores principales: De Rossi, M.E., Bromm, V.
Formato: JOUR
Materias:
Cosmology: theory
Galaxies: abundances
Galaxies: evolution
Galaxies: haloes
Galaxies: highredshift
Galaxies: star formation
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00358711_v465_n3_p3668_DeRossi
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00358711_v465_n3_p3668_DeRossi2023-10-03T14:47:18Z Contribution of the first galaxies to the cosmic far-infrared/sub-millimeter background - I. Mean background level De Rossi, M.E. Bromm, V. Cosmology: theory Galaxies: abundances Galaxies: evolution Galaxies: haloes Galaxies: highredshift Galaxies: star formation We study the contribution of the first galaxies to the far-infrared/sub-millimeter (FIR/sub-mm) extragalactic background light (EBL) by implementing an analytical model for dust emission. We explore different dust models, assuming different grain-size distributions and chemical compositions. According to our findings, observed reradiated emission from dust in dwarfsize galaxies at z ~ 10 would peak at a wavelength of ~500 μm with observed fluxes of ~10 -3 -10 -2 nJy, which is below the capabilities of current observatories. In order to be detectable, model sources at these high redshifts should exhibit luminosities of ≳10 12 L ⊙ , comparable to that of local ultraluminous systems. The FIR/sub-mm-EBL generated by primeval galaxies peaks at ~500 μm, with an intensity ranging from ~10 -4 to 10 -3 nWm -2 sr -1 , depending on dust properties. These values are ~3-4 orders of magnitude below the absolute measured cosmic background level, suggesting that the first galaxies would not contribute significantly to the observed FIR/sub-mm-EBL. Our model EBL exhibits a strong correlation with the dust-to-metal ratio, where we assume a fiducial value of D = 0.005, increasing almost proportionally to it. Thus, measurements of the FIR/sub-mm-EBL could provide constraints on the amount of dust in the early Universe. Even if the absolute signal from primeval dust emission may be undetectable, it might still be possible to obtain information about it by exploring angular fluctuations at ~500 μm, close to the peak of dust emission from the first galaxies. © 2016 The Authors. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00358711_v465_n3_p3668_DeRossi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Cosmology: theory
Galaxies: abundances
Galaxies: evolution
Galaxies: haloes
Galaxies: highredshift
Galaxies: star formation
spellingShingle Cosmology: theory
Galaxies: abundances
Galaxies: evolution
Galaxies: haloes
Galaxies: highredshift
Galaxies: star formation
De Rossi, M.E.
Bromm, V.
Contribution of the first galaxies to the cosmic far-infrared/sub-millimeter background - I. Mean background level
topic_facet Cosmology: theory
Galaxies: abundances
Galaxies: evolution
Galaxies: haloes
Galaxies: highredshift
Galaxies: star formation
description We study the contribution of the first galaxies to the far-infrared/sub-millimeter (FIR/sub-mm) extragalactic background light (EBL) by implementing an analytical model for dust emission. We explore different dust models, assuming different grain-size distributions and chemical compositions. According to our findings, observed reradiated emission from dust in dwarfsize galaxies at z ~ 10 would peak at a wavelength of ~500 μm with observed fluxes of ~10 -3 -10 -2 nJy, which is below the capabilities of current observatories. In order to be detectable, model sources at these high redshifts should exhibit luminosities of ≳10 12 L ⊙ , comparable to that of local ultraluminous systems. The FIR/sub-mm-EBL generated by primeval galaxies peaks at ~500 μm, with an intensity ranging from ~10 -4 to 10 -3 nWm -2 sr -1 , depending on dust properties. These values are ~3-4 orders of magnitude below the absolute measured cosmic background level, suggesting that the first galaxies would not contribute significantly to the observed FIR/sub-mm-EBL. Our model EBL exhibits a strong correlation with the dust-to-metal ratio, where we assume a fiducial value of D = 0.005, increasing almost proportionally to it. Thus, measurements of the FIR/sub-mm-EBL could provide constraints on the amount of dust in the early Universe. Even if the absolute signal from primeval dust emission may be undetectable, it might still be possible to obtain information about it by exploring angular fluctuations at ~500 μm, close to the peak of dust emission from the first galaxies. © 2016 The Authors.
format JOUR
author De Rossi, M.E.
Bromm, V.
author_facet De Rossi, M.E.
Bromm, V.
author_sort De Rossi, M.E.
title Contribution of the first galaxies to the cosmic far-infrared/sub-millimeter background - I. Mean background level
title_short Contribution of the first galaxies to the cosmic far-infrared/sub-millimeter background - I. Mean background level
title_full Contribution of the first galaxies to the cosmic far-infrared/sub-millimeter background - I. Mean background level
title_fullStr Contribution of the first galaxies to the cosmic far-infrared/sub-millimeter background - I. Mean background level
title_full_unstemmed Contribution of the first galaxies to the cosmic far-infrared/sub-millimeter background - I. Mean background level
title_sort contribution of the first galaxies to the cosmic far-infrared/sub-millimeter background - i. mean background level
url http://hdl.handle.net/20.500.12110/paper_00358711_v465_n3_p3668_DeRossi
work_keys_str_mv AT derossime contributionofthefirstgalaxiestothecosmicfarinfraredsubmillimeterbackgroundimeanbackgroundlevel
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