Outputs (39)

Observing EAGLE galaxies with JWST: predictions for Milky Way progenitors and their building blocks (2022)
Journal Article
Evans, T. A., Fattahi, A., Deason, A. J., & Frenk, C. S. (2022). Observing EAGLE galaxies with JWST: predictions for Milky Way progenitors and their building blocks. Monthly Notices of the Royal Astronomical Society, 516(3), 3861-3877. https://doi.org/10.1093/mnras/stac2410

We present predictions, derived from the EAGLE ΛCDM cosmological hydrodynamical simulations, for the abundance and properties of galaxies expected to be detected at high redshift by the James Webb Space Telescope (JWST). We consider the galaxy popula... Read More about Observing EAGLE galaxies with JWST: predictions for Milky Way progenitors and their building blocks.

Baryonic solutions and challenges for cosmological models of dwarf galaxies (2022)
Journal Article
Sales, L. V., Wetzel, A., & Fattahi, A. (2022). Baryonic solutions and challenges for cosmological models of dwarf galaxies. Nature Astronomy, 6(8), 897-910. https://doi.org/10.1038/s41550-022-01689-w

Galaxies and their dark-matter haloes have posed several challenges to the dark energy plus cold dark matter (ΛCDM) cosmological model. These discrepancies between observations and theory intensify for the lowest-mass (‘dwarf’) galaxies. ΛCDM predict... Read More about Baryonic solutions and challenges for cosmological models of dwarf galaxies.

Galactic tides and the Crater II dwarf spheroidal: a challenge to LCDM? (2022)
Journal Article
Borukhovetskaya, A., Navarro, J. F., Errani, R., & Fattahi, A. (2022). Galactic tides and the Crater II dwarf spheroidal: a challenge to LCDM?. Monthly Notices of the Royal Astronomical Society, 512(4), 5247-5257. https://doi.org/10.1093/mnras/stac653

The unusually low velocity dispersion and large size of Crater II pose a challenge to our understanding of dwarf galaxies in the Lambda cold dark matter (LCDM) cosmogony. The low velocity dispersion suggests either a dark halo mass much lower than th... Read More about Galactic tides and the Crater II dwarf spheroidal: a challenge to LCDM?.

The tidal evolution of the Fornax dwarf spheroidal and its globular clusters (2021)
Journal Article
Borukhovetskaya, A., Errani, R., Navarro, J. F., Fattahi, A., & Santos-Santos, I. (2022). The tidal evolution of the Fornax dwarf spheroidal and its globular clusters. Monthly Notices of the Royal Astronomical Society, 509(4), 5330-5339. https://doi.org/10.1093/mnras/stab2912

The dark matter content of the Fornax dwarf spheroidal galaxy inferred from its kinematics is substantially lower than expected from LCDM cosmological simulations. We use N-body simulations to examine whether this may be the result of Galactic tides.... Read More about The tidal evolution of the Fornax dwarf spheroidal and its globular clusters.

Magellanic satellites in ΛCDM cosmological hydrodynamical simulations of the Local Group (2021)
Journal Article
Santos-Santos, I. M., Fattahi, A., Sales, L. V., & Navarro, J. F. (2021). Magellanic satellites in ΛCDM cosmological hydrodynamical simulations of the Local Group. Monthly Notices of the Royal Astronomical Society, 504(3), 4551-4567. https://doi.org/10.1093/mnras/stab1020

We use the APOSTLE ΛCDM cosmological hydrodynamical simulations of the Local Group to study the recent accretion of massive satellites into the halo of Milky Way (MW)-sized galaxies. These systems are selected to be close analogues to the Large Magel... Read More about Magellanic satellites in ΛCDM cosmological hydrodynamical simulations of the Local Group.

Velocity-dependent J-factors for annihilation radiation from cosmological simulations (2021)
Journal Article
Board, E., Bozorgnia, N., Strigari, L. E., Grand, R. J., Fattahi, A., Frenk, C. S., Marinacci, F., Navarro, J. F., & Oman, K. A. (2021). Velocity-dependent J-factors for annihilation radiation from cosmological simulations. Journal of Cosmology and Astroparticle Physics, 2021(04), Article 070. https://doi.org/10.1088/1475-7516/2021/04/070

We determine the dark matter pair-wise relative velocity distribution in a set of Milky Way-like halos in the Auriga and APOSTLE simulations. Focusing on the smooth halo component, the relative velocity distribution is well-described by a Maxwell-Bol... Read More about Velocity-dependent J-factors for annihilation radiation from cosmological simulations.

Observing the Stellar Halo of Andromeda in Cosmological Simulations: The AURIGA2PANDAS Pipeline (2021)
Journal Article
Thomas, G. F., Martin, N. F., Fattahi, A., Ibata, R. A., Helly, J., McConnachie, A. W., Frenk, C., Gómez, F. A., Grand, R. J., Gwyn, S., Mackey, D., Marinacci, F., & Pakmor, R. (2021). Observing the Stellar Halo of Andromeda in Cosmological Simulations: The AURIGA2PANDAS Pipeline. Astrophysical Journal, 910(2), Article 92. https://doi.org/10.3847/1538-4357/abdfd2

We present a direct comparison of the Pan-Andromeda Archaeological Survey (PAndAS) observations of the stellar halo of M31 with the stellar halos of six galaxies from the Auriga simulations. We process the simulated halos through the Auriga2PAndAS pi... Read More about Observing the Stellar Halo of Andromeda in Cosmological Simulations: The AURIGA2PANDAS Pipeline.

The mass of the Milky Way out to 100 kpc using halo stars (2020)
Journal Article
Deason, A. J., Erkal, D., Belokurov, V., Fattahi, A., Gómez, F. A., Grand, R. J., Pakmor, R., Xue, X.-X., Liu, C., Yang, C., Zhang, L., & Zhao, G. (2021). The mass of the Milky Way out to 100 kpc using halo stars. Monthly Notices of the Royal Astronomical Society, 501(4), 5964-5972. https://doi.org/10.1093/mnras/staa3984

We use a distribution function analysis to estimate the mass of the Milky Way (MW) out to 100 kpc using a large sample of halo stars. These stars are compiled from the literature, and the vast majority (⁠∼98 per cent⁠) have 6D phase-space information... Read More about The mass of the Milky Way out to 100 kpc using halo stars.

Stellar splashback: the edge of the intracluster light (2020)
Journal Article
Deason, A. J., Oman, K. A., Fattahi, A., Schaller, M., Jauzac, M., Zhang, Y., Montes, M., Bahé, Y. M., Dalla Vecchia, C., Kay, S. T., & Evans, T. A. (2021). Stellar splashback: the edge of the intracluster light. Monthly Notices of the Royal Astronomical Society, 500(3), 4181-4192. https://doi.org/10.1093/mnras/staa3590

We examine the outskirts of galaxy clusters in the C-EAGLE simulations to quantify the ‘edges’ of the stellar and dark matter distribution. The radius of the steepest slope in the dark matter, commonly used as a proxy for the splashback radius, is lo... Read More about Stellar splashback: the edge of the intracluster light.

Local group star formation in warm and self-interacting dark matter cosmologies (2020)
Journal Article
Lovell, M., Hellwing, W., Ludlow, A., Zavala, J., Robertson, A., Fattahi, A., Frenk, C., & Hardwick, J. (2020). Local group star formation in warm and self-interacting dark matter cosmologies. Monthly Notices of the Royal Astronomical Society, 498(1), 702-717. https://doi.org/10.1093/mnras/staa2525

The nature of the dark matter can affect the collapse time of dark matter haloes, and can therefore be imprinted in observables such as the stellar population ages and star formation histories of dwarf galaxies. In this paper, we use high-resolution... Read More about Local group star formation in warm and self-interacting dark matter cosmologies.