Cited by 375Galaxies: Formation, Evolution, PhenomenaCosmology and Gravitation TheoriesStellar, planetary, and galactic studies

Baryon effects on the internal structure of ΛCDM haloes in the EAGLE simulations

Open access
Schaller, Matthieu, Frenk, Carlos S., Bower, Richard G., Theuns, Tom, Jenkins, Adrian, Schaye, Joop, Crain, Robert A., Furlong, Michelle +2 more·2015·Monthly Notices of the Royal Astronomical Society

Abstract

We investigate the internal structure and density profiles of haloes of mass 1010–1014 M⊙ in the Evolution and Assembly of Galaxies and their Environment (EAGLE) simulations. These follow the formation of galaxies in a Λ cold dark matter Universe and include a treatment of the baryon physics thought to be relevant. The EAGLE simulations reproduce the observed present-day galaxy stellar mass function, as well as many other properties of the galaxy population as a function of time. We find significant differences between the masses of haloes in the EAGLE simulations and in simulations that follow only the dark matter component. Nevertheless, haloes are well described by the Navarro–Frenk–White density profile at radii larger than ∼5 per cent of the virial radius but, closer to the centre, the presence of stars can produce cuspier profiles. Central enhancements in the total mass profile are most important in haloes of mass 1012–1013 M⊙, where the stellar fraction peaks. Over the radial range where they are well resolved, the resulting galaxy rotation curves are in very good agreement with observational data for galaxies with stellar mass M* < 5 × 1010 M⊙. We present an empirical fitting function that describes the total mass profiles and show that its parameters are strongly correlated with halo mass.

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Crossref · 10.1093/mnras/stv1067

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  • The fits to NFW profiles are limited to the radial range [0.05, 1] R_200.

    “As argued in previous studies (e.g. Neto et al. 2007; Schaller et al. 2015), we limit the fits to the radial range [0 . 05 , 1] R 200 .”

    From The milky way total mass profile as inferred from Gaia DR2 (2020) · cites this paper as Schaller et al. 2015

    Section 4.4 says the authors fit NFW profiles over [0.05, 1] R_vir, supporting the fitting range but not the claimed radius scale. Section 2.2 defines R_vir and R_200 separately, so the copy does not establish that the same range applies in units of R_200. Page numbers were not available in our copy. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • The EAGLE model reproduces galaxy rotation curves, the bimodal distribution of star formation rates and cosmic star formation history, the Hubble sequence of galaxy morphologies, and the Tully-Fisher relation over a wide range of galaxy masses.

    “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 Schaller et al. 2015

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Cites

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Research works printed but not linked: 5

  1. Furlong M. et al., 2014, preprint (arXiv:1410.3485) · arXiv
  2. Oñorbe J., Boylan-Kolchin M., Bullock J. S., Hopkins P. F., Kerěs D., Faucher-Giguère C.-A., Quataert E., Murray N., 2015, preprint (arXiv:1502.02036) · arXiv
  3. Rosas-Guevara Y. M. et al., 2013, preprint (arXiv:1312.0598) · arXiv
  4. Schaller M. et al., 2014, preprint (arXiv:1409.8297) · arXiv
  5. Strigari L. E., Frenk C. S., White S. D. M., 2014, preprint (arXiv:1406.6079) · arXiv

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Authors
Schaller, M., Frenk, C. S., Bower, R. G., Theuns, T., Jenkins, A., Schaye, J., Crain, R. A., Furlong, M., Dalla Vecchia, C., & McCarthy, I. G.
Affiliations
  • Durham University (GB)
  • University of Antwerp (BE)
  • Leiden University (NL)
  • Liverpool John Moores University (GB)
Corresponding author
Schaller, Matthieu
Venue
Monthly Notices of the Royal Astronomical Society
Published
2015-06-04
Volume
451
Issue
2
Pages
1247-1267
ISSN
  • 0035-8711 (ISSN-L)
  • 1365-2966
OpenAlex
W1940538082
Cited by
375
References
114
Citations by year
2026: 10 · 2025: 19 · 2024: 27 · 2023: 21 · 2022: 30 · 2021: 31 · 2020: 35 · 2019: 38 · 2018: 40 · 2017: 50 · 2016: 52 · 2015: 22
FWCI
31.11
Type
journal article
Language
en
Open access
Locations
  • Monthly Notices of the Royal Astronomical Society (publishedVersion)
  • Durham Research Online (Durham University) (publishedVersion, other-oa)
  • arXiv (Cornell University) (acceptedVersion)
  • Durham Research Online (Durham University) (acceptedVersion)
  • Leiden Repository (Leiden University) (submittedVersion)
  • Durham Research Online (Durham University) (submittedVersion, cc-by)
  • Liverpool John Moores University (submittedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
  • HighWire Press Open Archive (submittedVersion)
  • arXiv (Cornell University)
Funders
  • European Commission (238356)
  • Durham University (ST/K00042X/1, ST/K003267/1, ST/H008519/1)
  • Partnership for Advanced Computing in Europe AISBL
  • Belgian Federal Science Policy Office (AP P7/08 CHARM)
  • Nederlandse Organisatie voor Wetenschappelijk Onderzoek (ST/K00042X/1, ST/H008519/1)
  • Science and Technology Facilities Council (ST/H008519, ST/I004459/2, ST/K00042X/1, ST/L00061X/1, ST/I00162X/1, ST/L00075X/1, ST/M007006/1, ST/I004459/1, ST/H008519/1, ST/K003267/1)
  • FP7 Ideas: European Research Council (278594, 267291)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
Keywords
halo density profiles, Navarro-Frenk-White profile, stellar mass fraction, galaxy rotation curves, halo mass, EAGLE simulation

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