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Far-infrared and dust properties of present-day galaxies in the EAGLE simulations

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Abstract
The Evolution and Assembly of GaLaxies and their Environments (EAGLE) cosmological simulations reproduce the observed galaxy stellar mass function and many galaxy properties. In this work, we study the dust-related properties of present-day EAGLE galaxies through mock observations in the far-infrared and submm wavelength ranges obtained with the 3D dust radiative transfer code SKIRT. To prepare an EAGLE galaxy for radiative transfer processing, we derive a diffuse dust distribution from the gas particles and we re-sample the star-forming gas particles and the youngest star particles into star-forming regions that are assigned dedicated emission templates. We select a set of redshift-zero EAGLE galaxies that matches the K-band luminosity distribution of the galaxies in the Herschel Reference Survey (HRS), a volumelimited sample of about 300 normal galaxies in the Local Universe. We find overall agreement of the EAGLE dust scaling relations with those observed in the HRS, such as the dust-tostellar mass ratio versus stellar mass and versus NUV-r colour relations. A discrepancy in the f(250)/f(350) versus f(350)/f(500) submm colour-colour relation implies that part of the simulated dust is insufficiently heated, likely because of limitations in our sub-grid model for star-forming regions. We also investigate the effect of adjusting the metal-to-dust ratio and the covering factor of the photodissociation regions surrounding the star-forming cores. We are able to constrain the important dust-related parameters in our method, informing the calculation of dust attenuation for EAGLE galaxies in the UV and optical domain.
Keywords
radiative transfer, methods: numerical, dust, extinction, galaxies: formation, infrared: ISM, RADIATIVE-TRANSFER SIMULATIONS, HERSCHEL REFERENCE SURVEY, STAR-FORMING GALAXIES, SPECTRAL ENERGY-DISTRIBUTION, DIFFUSE INTERSTELLAR-MEDIUM, MASS-METALLICITY RELATION, ACTIVE GALACTIC NUCLEI, DIGITAL SKY SURVEY, SCALING RELATIONS, NEARBY GALAXIES

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Citation

Please use this url to cite or link to this publication:

Chicago
Camps, Peter, James W Trayford, Maarten Baes, Tom Theuns, Matthieu Schaller, and Joop Schaye. 2016. “Far-infrared and Dust Properties of Present-day Galaxies in the EAGLE Simulations.” Monthly Notices of the Royal Astronomical Society 462 (1): 1057–1075.
APA
Camps, P., Trayford, J. W., Baes, M., Theuns, T., Schaller, M., & Schaye, J. (2016). Far-infrared and dust properties of present-day galaxies in the EAGLE simulations. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 462(1), 1057–1075.
Vancouver
1.
Camps P, Trayford JW, Baes M, Theuns T, Schaller M, Schaye J. Far-infrared and dust properties of present-day galaxies in the EAGLE simulations. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 2016;462(1):1057–75.
MLA
Camps, Peter, James W Trayford, Maarten Baes, et al. “Far-infrared and Dust Properties of Present-day Galaxies in the EAGLE Simulations.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 462.1 (2016): 1057–1075. Print.
@article{8503158,
  abstract     = {The Evolution and Assembly of GaLaxies and their Environments (EAGLE) cosmological simulations reproduce the observed galaxy stellar mass function and many galaxy properties. In this work, we study the dust-related properties of present-day EAGLE galaxies through mock observations in the far-infrared and submm wavelength ranges obtained with the 3D dust radiative transfer code SKIRT. To prepare an EAGLE galaxy for radiative transfer processing, we derive a diffuse dust distribution from the gas particles and we re-sample the star-forming gas particles and the youngest star particles into star-forming regions that are assigned dedicated emission templates. We select a set of redshift-zero EAGLE galaxies that matches the K-band luminosity distribution of the galaxies in the Herschel Reference Survey (HRS), a volumelimited sample of about 300 normal galaxies in the Local Universe. We find overall agreement of the EAGLE dust scaling relations with those observed in the HRS, such as the dust-tostellar mass ratio versus stellar mass and versus NUV-r colour relations. A discrepancy in the f(250)/f(350) versus f(350)/f(500) submm colour-colour relation implies that part of the simulated dust is insufficiently heated, likely because of limitations in our sub-grid model for star-forming regions. We also investigate the effect of adjusting the metal-to-dust ratio and the covering factor of the photodissociation regions surrounding the star-forming cores. We are able to constrain the important dust-related parameters in our method, informing the calculation of dust attenuation for EAGLE galaxies in the UV and optical domain.},
  author       = {Camps, Peter and Trayford, James W and Baes, Maarten and Theuns, Tom and Schaller, Matthieu and Schaye, Joop},
  issn         = {0035-8711},
  journal      = {MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY},
  keyword      = {radiative transfer,methods: numerical,dust,extinction,galaxies: formation,infrared: ISM,RADIATIVE-TRANSFER SIMULATIONS,HERSCHEL REFERENCE SURVEY,STAR-FORMING GALAXIES,SPECTRAL ENERGY-DISTRIBUTION,DIFFUSE INTERSTELLAR-MEDIUM,MASS-METALLICITY RELATION,ACTIVE GALACTIC NUCLEI,DIGITAL SKY SURVEY,SCALING RELATIONS,NEARBY GALAXIES},
  language     = {eng},
  number       = {1},
  pages        = {1057--1075},
  title        = {Far-infrared and dust properties of present-day galaxies in the EAGLE simulations},
  url          = {http://dx.doi.org/10.1093/mnras/stw1735},
  volume       = {462},
  year         = {2016},
}

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