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Reproducing the Universe : a comparison between the EAGLE simulations and the nearby DustPedia galaxy sample

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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.</jats:p>
Keywords
SPECTRAL ENERGY-DISTRIBUTION, STAR-FORMATION RATE, RADIATIVE-TRANSFER CODE, DUST-TO-GAS, COSMOLOGICAL SIMULATION, STARBURST GALAXIES, FORMATION RATES, STELLAR MASSES, SKY SURVEY, MILKY-WAY. Radiative transfer, methods: numerical, dust, extinction, galaxies: evolution, galaxies: formation, submillimetre: galaxies

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MLA
Trčka, Ana, et al. “Reproducing the Universe : A Comparison between the EAGLE Simulations and the Nearby DustPedia Galaxy Sample.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 494, 2020, pp. 2823–38, doi:10.1093/mnras/staa857.
APA
Trčka, A., Baes, M., Camps, P., van der Wel, S. M., Trayford, J., Bianchi, S., … Xilouris, E. M. (2020). Reproducing the Universe : a comparison between the EAGLE simulations and the nearby DustPedia galaxy sample. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 494, 2823–2838. https://doi.org/10.1093/mnras/staa857
Chicago author-date
Trčka, Ana, Maarten Baes, Peter Camps, Sharon Meidt van der Wel, James Trayford, Simone Bianchi, Viviana Casasola, et al. 2020. “Reproducing the Universe : A Comparison between the EAGLE Simulations and the Nearby DustPedia Galaxy Sample.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 494: 2823–38. https://doi.org/10.1093/mnras/staa857.
Chicago author-date (all authors)
Trčka, Ana, Maarten Baes, Peter Camps, Sharon Meidt van der Wel, James Trayford, Simone Bianchi, Viviana Casasola, Letizia P Cassarà, Ilse De Looze, Pieter De Vis, Wouter Dobbels, Jacopo Fritz, Maud Galametz, Frédéric Galliano, Antonios Katsianis, Suzanne C Madden, Aleksandr V Mosenkov, Angelos Nersesian, Sébastien Viaene, and Emmanuel M Xilouris. 2020. “Reproducing the Universe : A Comparison between the EAGLE Simulations and the Nearby DustPedia Galaxy Sample.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 494: 2823–2838. doi:10.1093/mnras/staa857.
Vancouver
1.
Trčka A, Baes M, Camps P, van der Wel SM, Trayford J, Bianchi S, et al. Reproducing the Universe : a comparison between the EAGLE simulations and the nearby DustPedia galaxy sample. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 2020;494:2823–38.
IEEE
[1]
A. Trčka et al., “Reproducing the Universe : a comparison between the EAGLE simulations and the nearby DustPedia galaxy sample,” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 494, pp. 2823–2838, 2020.
@article{8699276,
  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.</jats:p>}},
  author       = {{Trčka, Ana and Baes, Maarten and Camps, Peter and van der Wel, Sharon Meidt and Trayford, James and Bianchi, Simone and Casasola, Viviana and Cassarà, Letizia P and De Looze, Ilse and De Vis, Pieter and Dobbels, Wouter and Fritz, Jacopo and Galametz, Maud and Galliano, Frédéric and Katsianis, Antonios and Madden, Suzanne C and Mosenkov, Aleksandr V and Nersesian, Angelos and Viaene, Sébastien and Xilouris, Emmanuel M}},
  issn         = {{0035-8711}},
  journal      = {{MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY}},
  keywords     = {{SPECTRAL ENERGY-DISTRIBUTION,STAR-FORMATION RATE,RADIATIVE-TRANSFER CODE,DUST-TO-GAS,COSMOLOGICAL SIMULATION,STARBURST GALAXIES,FORMATION RATES,STELLAR MASSES,SKY SURVEY,MILKY-WAY. Radiative transfer,methods: numerical,dust,extinction,galaxies: evolution,galaxies: formation,submillimetre: galaxies}},
  language     = {{eng}},
  pages        = {{2823--2838}},
  title        = {{Reproducing the Universe : a comparison between the EAGLE simulations and the nearby DustPedia galaxy sample}},
  url          = {{http://dx.doi.org/10.1093/mnras/staa857}},
  volume       = {{494}},
  year         = {{2020}},
}

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