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On the simultaneous modelling of dust and stellar populations for interpretation of galaxy properties
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Jones, Gareth, Stanway, Elizabeth R. and Carnall, A. C. (2022) On the simultaneous modelling of dust and stellar populations for interpretation of galaxy properties. Monthly Notices of the Royal Astronomical Society, 514 (4). pp. 5706-5724. doi:10.1093/mnras/stac1667 ISSN 1745-3933.
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WRAP-On-simultaneous-modelling-dust-stellar-populations-interpretation-galaxy-2022.pdf - Accepted Version - Requires a PDF viewer. Download (2610Kb) | Preview |
Official URL: https://doi.org/10.1093/mnras/stac1667
Abstract
The physical properties of galaxies are encoded within their spectral energy distribution and require comparison with models to be extracted. These models must contain a synthetic stellar population and, where infrared data are to be used, also consider prescriptions for energy reprocessing and re-emission by dust. While many such models have been constructed, there are few analyses of the impact of stellar population model choice on derived dust parameters, or vice versa. Here, we apply a simple framework to compare the impact of these choices, combining three commonly used stellar population synthesis models and three dust emission models. We compare fits to the ultraviolet to far-infrared spectral energy distributions of a validation sample of infrared-luminous galaxies. We find that including different physics, such as binary stellar evolution, in the stellar synthesis model can introduce biases and uncertainties in the derived parameters of the dust and stellar emission models, largely due to differences in the far-ultraviolet emission available for reprocessing. This may help to reconcile the discrepancy between the cosmic star formation rate and stellar mass density histories. Notably the inclusion of a dusty stellar birth cloud component in the dust emission model provides more flexibility in accommodating the stellar population model, as its re-emission is highly sensitive to the ultraviolet radiation field spectrum and density. Binary populations favour a longer birth cloud dissipation time-scale than is found when assuming only single star population synthesis.
Item Type: | Journal Article | |||||||||
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Subjects: | Q Science > QB Astronomy | |||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||
Library of Congress Subject Headings (LCSH): | Galaxies, Stars -- Populations, Stars -- Evolution, Stars -- Formation, Cosmic dust, Interstellar matter, Astronomical photometry | |||||||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | |||||||||
Publisher: | Oxford University Press | |||||||||
ISSN: | 1745-3933 | |||||||||
Official Date: | August 2022 | |||||||||
Dates: |
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Volume: | 514 | |||||||||
Number: | 4 | |||||||||
Page Range: | pp. 5706-5724 | |||||||||
DOI: | 10.1093/mnras/stac1667 | |||||||||
Status: | Peer Reviewed | |||||||||
Publication Status: | Published | |||||||||
Reuse Statement (publisher, data, author rights): | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. | |||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||
Copyright Holders: | © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society | |||||||||
Date of first compliant deposit: | 13 June 2022 | |||||||||
Date of first compliant Open Access: | 13 June 2022 | |||||||||
RIOXX Funder/Project Grant: |
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