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|Title:||Reproducing the Universe: a comparison between the EAGLE simulations and the nearby DustPedia galaxy sample||Authors:||Trčka, Ana
Meidt, Sharon E.
CASSARA, LETIZIA PASQUA
De Looze, Ilse
De Vis, Pieter
Madden, Suzanne C.
Mosenkov, Aleksandr V.
Xilouris, Emmanuel M.
|Issue Date:||2020||Journal:||MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY||Number:||494||Issue:||2||First Page:||2823||Abstract:||We compare the spectral energy distributions (SEDs) and inferred physical properties for simulated and observed galaxies at low redshift. We exploit UV-submillimetre mock fluxes of ˜7000 z = 0 galaxies from the EAGLE suite of cosmological simulations, derived using the radiative transfer code skirt. We compare these to ˜800 observed galaxies in the UV-submillimetre range, from the DustPedia sample of nearby galaxies. To derive global properties, we apply the SED fitting code cigale consistently to both data sets, using the same set of ˜80 million models. The results of this comparison reveal overall agreement between the simulations and observations, both in the SEDs and in the derived physical properties, with a number of discrepancies. The optical and far-infrared regimes, and the scaling relations based upon the global emission, diffuse dust, and stellar mass, show high levels of agreement. However, the mid-infrared fluxes of the EAGLE galaxies are overestimated while the far-UV domain is not attenuated enough, compared to the observations. We attribute these discrepancies to a combination of galaxy population differences between the samples and limitations in the subgrid treatment of star-forming regions in the EAGLE-skirt post-processing recipe. Our findings show the importance of detailed radiative transfer calculations and consistent comparison, and provide suggestions for improved numerical models.||URI:||http://hdl.handle.net/20.500.12386/31011||URL:||https://academic.oup.com/mnras/article/494/2/2823/5815797||ISSN:||0035-8711||DOI:||10.1093/mnras/staa857||Bibcode ADS:||2020MNRAS.494.2823T||Fulltext:||open|
|Appears in Collections:||1.01 Articoli in rivista|
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checked on Sep 16, 2021
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