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Colours and luminosities of z = 0.1 galaxies in the eagle simulation
Open accessAbstract
We calculate the colours and luminosities of redshift z = 0.1 galaxies from the EAGLE simulation suite using the GALAXEV population synthesis models. We take into account obscuration by dust in birth clouds and diffuse ISM using a two-component screen model, following the prescription of Charlot and Fall. We compare models in which the dust optical depth is constant to models where it depends on gas metallicity, gas fraction and orientation. The colours of EAGLE galaxies for the more sophisticated models are in broad agreement with those of observed galaxies. In particular, EAGLE produces a red sequence of passive galaxies and a blue cloud of star forming galaxies, with approximately the correct fraction of galaxies in each population and with g-r colours within 0.1 magnitudes of those observed. Luminosity functions from UV to NIR wavelengths differ from observations at a level comparable to systematic shifts resulting from a choice between Petrosian and Kron photometric apertures. Despite the generally good agreement there are clear discrepancies with observations. The blue cloud of EAGLE galaxies extends to somewhat higher luminosities than in the data, consistent with the modest underestimate of the passive fraction in massive EAGLE galaxies. There is also a moderate excess of bright blue galaxies compared to observations. The overall level of agreement with the observed colour distribution suggests that EAGLE galaxies at z = 0.1 have ages, metallicities and levels of obscuration that are comparable to those of observed galaxies.
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“The EAGLE model reproduces galaxy rotation curves (Schaller et al. 2015), the bimodal distribution of star formation rates and the cosmic star formation history (Furlong et al. 2015), the Hubble sequence of galaxy morphologies (Trayford et al. 2015) and the Tully-Fisher relation over a wide range of galaxy masses (Ferrero et al. 2017).”
From The milky way total mass profile as inferred from Gaia DR2 (2020) · cites this paper as Trayford et al. 2015
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First results from the IllustrisTNG simulations: the galaxy colour bimodality
Nelson, D., Pillepich, A., Springel, V., Weinberger, R., Hernquist, L., Pakmor, R., Genel, S., Torrey, P., Vogelsberger, M., Kauffmann, G., et al. (2017) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stx3040 · Cited by 1,705
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The APOSTLE simulations: solutions to the Local Group's cosmic puzzles
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Self-citationThe eagle simulations of galaxy formation: Public release of halo and galaxy catalogues
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Metadata
- Authors
- Trayford, J. W., Theuns, T., Bower, R. G., Schaye, J., Furlong, M., Schaller, M., Frenk, C. S., Crain, R. A., Vecchia, C. D., & McCarthy, I. G.
- Affiliations
- Durham University (GB)
- Leiden University (NL)
- Liverpool John Moores University (GB)
- Universidad de La Laguna (ES)
- Corresponding author
- Trayford, James W.
- ORCID
- Venue
- Monthly Notices of the Royal Astronomical Society
- Publisher
- Oxford University Press (OUP)
- Published
- 2015-07-29
- Volume
- 452
- Issue
- 3
- Pages
- 2879-2896
- ISSN
- 0035-8711 (ISSN-L)
- 1365-2966
- OpenAlex
- W1735913374
- Cited by
- 251
- References
- 114
- Citations by year
- 2026: 9 · 2025: 16 · 2024: 11 · 2023: 20 · 2022: 21 · 2021: 18 · 2020: 29 · 2019: 32 · 2018: 24 · 2017: 31 · 2016: 33 · 2015: 7
- FWCI
- 17.64
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Monthly Notices of the Royal Astronomical Society (publishedVersion)
- Liverpool John Moores University (acceptedVersion)
- Durham Research Online (Durham University) (acceptedVersion)
- arXiv (Cornell University) (submittedVersion)
- Leiden Repository (Leiden University) (submittedVersion)
- Durham Research Online (Durham University) (submittedVersion, cc-by)
- HighWire Press Open Archive (submittedVersion)
- Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
- arXiv (Cornell University)
- Funders
- Durham University (ST/K00042X/1, ST/K003267/1, ST/H008519/1)
- Belgian Federal Science Policy Office (AP P7/08 CHARM)
- Science and Technology Facilities Council (ST/I00162X/1, ST/H008519, ST/I004459/2, ST/K00042X/1, ST/M007006/1, ST/L00075X/1, ST/L00061X/1, ST/F001166/1, ST/H008519/1, ST/K003267/1, ST/I004459/1)
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysics and Star Formation Studies
- Keywords
- galaxy color, galaxy luminosity function, EAGLE simulation, dust attenuation, red sequence, blue cloud, quiescent galaxies, star-forming galaxies, intermediate-redshift galaxies
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