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Subhalo destruction in the Apostle and Auriga simulations (2019)
Journal Article
Richings, J., Frenk, C., Jenkins, A., Robertson, A., Fattahi, A., Grand, R. J., Navarro, J., Pakmor, R., Gomez, F. A., Marinacci, F., & Oman, K. (2020). Subhalo destruction in the Apostle and Auriga simulations. Monthly Notices of the Royal Astronomical Society, 492(4), 5780-5793. https://doi.org/10.1093/mnras/stz3448

N-body simulations make unambiguous predictions for the abundance of substructures within dark matter halos. However, the inclusion of baryons in the simulations changes the picture because processes associated with the presence of a large galaxy in... Read More about Subhalo destruction in the Apostle and Auriga simulations.

The distinct stellar metallicity populations of simulated Local Group dwarfs (2019)
Journal Article
Genina, A., Frenk, C. S., Benítez-Llambay, A., Cole, S., Navarro, J. F., Oman, K. A., & Fattahi, A. (2019). The distinct stellar metallicity populations of simulated Local Group dwarfs. Monthly Notices of the Royal Astronomical Society, 488(2), 2312-2331. https://doi.org/10.1093/mnras/stz1852

A number of Local Group dwarf galaxies are known to have two spatially segregated stellar metallicity populations, a centrally concentrated metal-rich population and a more extended metal-poor population. In this work we discuss mechanisms that lead... Read More about The distinct stellar metallicity populations of simulated Local Group dwarfs.

On the correlation between the local dark matter and stellar velocities (2019)
Journal Article
Bozorgnia, N., Fattahi, A., Cerdeño, D. G., Frenk, C. S., Gómez, F. A., Grand, R. J., Marinacci, F., & Pakmor, R. (2019). On the correlation between the local dark matter and stellar velocities. Journal of Cosmology and Astroparticle Physics, 2019(06), Article 045. https://doi.org/10.1088/1475-7516/2019/06/045

The dark matter velocity distribution in the Solar neighbourhood is an important astrophysical input which enters in the predicted event rate of dark matter direct detection experiments. It has been recently suggested that the local dark matter veloc... Read More about On the correlation between the local dark matter and stellar velocities.

The velocity anisotropy of the Milky Way satellite system (2019)
Journal Article
Riley, A. H., Fattahi, A., Pace, A. B., Strigari, L. E., Frenk, C. S., Gómez, F. A., …White, S. D. (2019). The velocity anisotropy of the Milky Way satellite system. Monthly Notices of the Royal Astronomical Society, 486(2), 2679-2694. https://doi.org/10.1093/mnras/stz973

We analyse the orbital kinematics of the Milky Way (MW) satellite system utilizing the latest systemic proper motions for 38 satellites based on data from Gaia Data Release 2. Combining these data with distance and line-of-sight velocity measurements... Read More about The velocity anisotropy of the Milky Way satellite system.

The star formation histories of dwarf galaxies in Local Group cosmological simulations (2019)
Journal Article
Digby, R., Navarro, J. F., Fattahi, A., Simpson, C. M., Oman, K., Gomez, F. A., Frenk, C. S., Grand, R. J., & Pakmor, R. (2019). The star formation histories of dwarf galaxies in Local Group cosmological simulations. Monthly Notices of the Royal Astronomical Society, 485(4), 5423-5437. https://doi.org/10.1093/mnras/stz745

We use the apostle and Auriga cosmological simulations to study the star formation histories (SFHs) of field and satellite dwarf galaxies. Despite sizeable galaxy-to-galaxy scatter, the SFHs of apostle and Auriga dwarfs exhibit robust average trends... Read More about The star formation histories of dwarf galaxies in Local Group cosmological simulations.

The local high-velocity tail and the Galactic escape speed (2019)
Journal Article
Deason, A. J., Fattahi, A., Belokurov, V., Evans, N. W., Grand, R. J., Marinacci, F., & Pakmor, R. (2019). The local high-velocity tail and the Galactic escape speed. Monthly Notices of the Royal Astronomical Society, 485(3), 3514-3526. https://doi.org/10.1093/mnras/stz623

We model the fastest moving (⁠v tot >300kms −1 vtot>300kms−1 ⁠) local (D ≲ 3 kpc) halo stars using cosmological simulations and six-dimensional Gaia data. Our approach is to use our knowledge of the assembly history and phase-space distribution of ha... Read More about The local high-velocity tail and the Galactic escape speed.

The origin of galactic metal-rich stellar halo components with highly eccentric orbits (2019)
Journal Article
Fattahi, A., Belokurov, V., Deason, A. J., Frenk, C. S., Gómez, F. A., Grand, R. J., Marinacci, F., Pakmor, R., & Springel, V. (2019). The origin of galactic metal-rich stellar halo components with highly eccentric orbits. Monthly Notices of the Royal Astronomical Society, 484(4), 4471-4483. https://doi.org/10.1093/mnras/stz159

Using the astrometry from the ESA’s Gaia mission, previous works have shown that the Milky Way stellar halo is dominated by metal-rich stars on highly eccentric orbits. To shed light on the nature of this prominent halo component, we have analysed 28... Read More about The origin of galactic metal-rich stellar halo components with highly eccentric orbits.

The core–cusp problem: a matter of perspective (2017)
Journal Article
Genina, A., Benítez-Llambay, A., Frenk, C. S., Cole, S., Fattahi, A., Navarro, J. F., …Theuns, T. (2017). The core–cusp problem: a matter of perspective. Monthly Notices of the Royal Astronomical Society, 474(1), 1398-1411. https://doi.org/10.1093/mnras/stx2855

The existence of two kinematically and chemically distinct stellar subpopulations in the Sculptor and Fornax dwarf galaxies offers the opportunity to constrain the density profile of their matter haloes by measuring the mass contained within the well... Read More about The core–cusp problem: a matter of perspective.