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The duration of reionization constrains the ionizing sources
Mahavir Sharma, Tom Theuns, Carlos Frenk
We investigate how the nature of the galaxies that reionized the Universe affects the duration of reionization. We contrast two sets of models: one in which galaxies on the faint s…
CEMPlifying reionization
Mahavir Sharma, Tom Theuns, Carlos Frenk
The massive stars that ionised the Universe have short lifetimes and can only be studied near the time of formation, but any low mass stars that formed contemporaneously might be o…
The multiplicity and anisotropy of galactic satellite accretion
Shi Shao, Marius Cautun, Carlos S. Frenk +4
We study the incidence of group and filamentary dwarf galaxy accretion into Milky Way (MW) mass haloes using two types of hydrodynamical simulations: EAGLE, which resolves a large…
Bars in dark matter-dominated dwarf galaxy discs
A. Marasco, K. A. Oman, J. F. Navarro +2
We study the shape and kinematics of simulated dwarf galaxy discs in the APOSTLE suite of CDM cosmological hydrodynamical simulations. We find that a large fraction of these gas…
Comparing galaxy formation in semi-analytic models and hydrodynamical simulations
Peter D. Mitchell, Cedric G. Lacey, Claudia D. P. Lagos +7
It is now possible for hydrodynamical simulations to reproduce a representative galaxy population. Accordingly, it is timely to assess critically some of the assumptions of traditi…
The innate origin of radial and vertical gradients in a simulated galaxy disc
Julio F. Navarro, Cameron Yozin, Nic Loewen +6
We examine the origin of radial and vertical gradients in the age/metallicity of the stellar component of a galaxy disc formed in the APOSTLE cosmological hydrody- namical simulati…
HBT+: an improved code for finding subhalos and building merger trees in cosmological simulations
Jiaxin Han, Shaun Cole, Carlos S. Frenk +2
Dark matter subhalos are the remnants of (incomplete) halo mergers. Identifying them and establishing their evolutionary links in the form of merger trees is one of the most import…
The total satellite population of the Milky Way
Oliver Newton, Marius Cautun, Adrian Jenkins +2
The total number and luminosity function of the population of dwarf galaxies of the Milky Way (MW) provide important constraints on the nature of the dark matter and on the astroph…
A new gas cooling model for semi-analytical galaxy formation models
Jun Hou, Cedric G. Lacey, Carlos. S. Frenk
Semi-analytic galaxy formation models are widely used to gain insight into the astrophysics of galaxy formation and in model testing, parameter space searching and mock catalogue b…
Resolution of the apparent discrepancy between the number of massive subhaloes in Abell 2744 and ΛCDM
Tian-Xiang Mao, Jie Wang, Carlos S. Frenk +5
Schwinn et al. (2017) have recently compared the abundance and distribution of massive substructures identified in a gravitational lensing analysis of Abell 2744 by Jauzac et al. (…
The vertical structure of gaseous galaxy discs in cold dark matter halos
Alejandro Benitez-Llambay, Julio F. Navarro, Carlos S. Frenk +1
We study the vertical structure of polytropic, , centrifugally-supported gaseous discs embedded in cold dark matter (CDM) halos. At fixed radius , the shape of the…
Globular clusters vs dark matter haloes in strong lensing observations
Qiuhan He, Ran Li, Sungsoon Lim +4
Small distortions in the images of Einstein rings or giant arcs offer the exciting prospect of detecting dark matter haloes or subhaloes of mass below M, most of wh…
The core-cusp problem: a matter of perspective
Anna Genina, Alejandro Benitez-Llambay, Carlos S. Frenk +6
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…
Tidal stripping and the structure of dwarf galaxies in the Local Group
Azadeh Fattahi, Julio F. Navarro, Carlos S. Frenk +3
The shallow faint-end slope of the galaxy mass function is usually reproduced in CDM galaxy formation models by assuming that the fraction of baryons that turns into stars drops…
Non-circular motions and the diversity of dwarf galaxy rotation curves
Kyle A. Oman, Antonino Marasco, Julio F. Navarro +3
We use mock interferometric HI measurements and a conventional tilted-ring modelling procedure to estimate circular velocity curves of dwarf galaxy discs from the APOSTLE suite of…
Optical colours and spectral indices of EAGLE galaxies with 3D dust radiative transfer code SKIRT
James W. Trayford, Peter Camps, Tom Theuns +7
We present mock optical images, broad-band and H fluxes, and D4000 spectral indices for 30,145 galaxies from the EAGLE hydrodynamical simulation at redshift , modelling d…
Quenching and ram pressure stripping of simulated Milky Way satellite galaxies
Christine M. Simpson, Robert J. J. Grand, Facundo A. Gómez +5
We present predictions for the quenching of star formation in satellite galaxies of the Local Group from a suite of 30 cosmological zoom simulations of Milky Way-like host galaxies…
Lessons from the Auriga discs: The hunt for the Milky Way's ex-situ disc is not yet over
Facundo A. Gómez, Robert J. J. Grand, Antonela Monachesi +7
We characterize the contribution from accreted material to the galactic discs of the Auriga Project, a set of high resolution magnetohydrodynamic cosmological simulations of late-t…
Predictions for deep galaxy surveys with JWST from CDM
William Cowley, Carlton Baugh, Shaun Cole +2
We present predictions for the outcome of deep galaxy surveys with the () obtained from a physical model of galaxy formation in CDM. We…
Magnetic field formation in the Milky Way-like disk galaxies of the Auriga project
Ruediger Pakmor, Facundo A. Gomez, Robert J. J. Grand +8
The magnetic fields observed in the Milky~Way and nearby galaxies appear to be in equipartition with the turbulent, thermal, and cosmic ray energy densities, and hence are expected…