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Local Group galaxies emerge from the dark
Till Sawala, Carlos S. Frenk, Azadeh Fattahi +13
The "Lambda Cold Dark Matter" (LCDM) model of cosmic structure formation is eminently falsifiable: once its parameters are fixed on large scales, it becomes testable in the nearby…
The Size Evolution of Elliptical Galaxies
Lizhi Xie, Qi Guo, Andrew P. Cooper +3
Recent work has suggested that the amplitude of the size mass relation of massive early type galaxies evolves with redshift. Here we use a semi-analytical galaxy formation model to…
A new spin on disks of satellite galaxies
Marius Cautun, Wenting Wang, Carlos S. Frenk +1
We investigate the angular and kinematic distributions of satellite galaxies around a large sample of bright isolated primaries in the spectroscopic and photometric catalogues of t…
Evolution of galaxy stellar masses and star formation rates in the EAGLE simulations
M. Furlong, R. G. Bower, T. Theuns +9
We investigate the evolution of galaxy masses and star formation rates in the Evolution and Assembly of Galaxies and their Environment (EAGLE) simulations. These comprise a suite o…
How well can cold-dark-matter substructures account for the observed radio flux-ratio anomalies?
Dandan Xu, Dominique Sluse, Liang Gao +5
Discrepancies between the observed and model-predicted radio flux ratios are seen in a number of quadruply-lensed quasars. The most favored interpretation of these anomalies is tha…
Baryon effects on the internal structure of LCDM halos in the EAGLE simulations
Matthieu Schaller, Carlos S. Frenk, Richard G. Bower +7
We investigate the internal structure and density profiles of halos of mass in the Evolution and Assembly of Galaxies and their Environment (EAGLE) simula…
The effect of baryons on the inner density profiles of rich clusters
Matthieu Schaller, Carlos S. Frenk, Richard G. Bower +7
We use the "Evolution and assembly of galaxies and their environments" (EAGLE) cosmological simulation to investigate the effect of baryons on the density profiles of rich galaxy c…
Orbital parameters of infalling satellite haloes in the hierarchical CDM model
Lilian Jiang, Shaun Cole, Till Sawala +1
We present distributions of orbital parameters of infalling satellites of CDM haloes in the mass range M, which represent the initial conditions for the…
Elemental Abundances in Milky Way-like Galaxies from a Hierarchical Galaxy Formation Model
Gabriella De Lucia, Luca Tornatore, Carlos S. Frenk +3
We develop a new method to account for the finite lifetimes of stars and trace individual abundances within a semi-analytic model of galaxy formation. At variance with previous met…
The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
Joop Schaye, Robert A. Crain, Richard G. Bower +19
We introduce the Virgo Consortium's EAGLE project, a suite of hydrodynamical simulations that follow the formation of galaxies and black holes in representative volumes. We discuss…
Surface photometry of BCGs and intracluster stars in Lambda-CDM
Andrew P. Cooper, Liang Gao, Qi Guo +4
We simulate the phase-space distribution of stellar mass in 9 massive Lambda-CDM galaxy clusters by applying the semi-analytic particle tagging method of Cooper et al. to the Phoen…
The chosen few: the low mass halos that host faint galaxies
Till Sawala, Carlos S. Frenk, Azadeh Fattahi +8
Since reionization prevents star formation in most halos below 3 x 10^9 solar masses, dwarf galaxies only populate a fraction of existing dark matter halos. We use hydrodynamic cos…
Dynamical models for the Sculptor dwarf spheroidal in a Lambda CDM universe
Louis E. Strigari, Carlos S. Frenk, Simon D. M. White
The Sculptor dwarf spheroidal galaxy contains two distinct stellar populations: one metal-rich and the other metal-poor. Several authors have argued that in order for these two pop…
Subhalo statistics of galactic halos: beyond the resolution limit
Marius Cautun, Wojciech A. Hellwing, Rien van de Weygaert +3
We study the substructure population of Milky Way (MW)-mass halos in the CDM cosmology using a novel procedure to extrapolate subhalo number statistics beyond the resolution lim…
Milky Way mass constraints from the Galactic satellite gap
Marius Cautun, Carlos S. Frenk, Rien van de Weygaert +2
We use the distribution of maximum circular velocities, , of satellites in the Milky Way (MW) to constrain the virial mass, , of the Galactic halo under an assume…
Bent by baryons: the low mass galaxy-halo relation
Till Sawala, Carlos S. Frenk, Azadeh Fattahi +11
The relation between galaxies and dark matter halos is of vital importance for evaluating theoretical predictions of structure formation and galaxy formation physics. We show that…
Galaxy and Mass Assembly (GAMA): The halo mass of galaxy groups from maximum-likelihood weak lensing
Jiaxin Han, Vincent R. Eke, Carlos S. Frenk +12
We present a maximum-likelihood weak lensing analysis of the mass distribution in optically selected spectroscopic Galaxy Groups (GCv5) in the Galaxy And Mass Assembly (GAMA) s…
Evolution of the cosmic web
Marius Cautun, Rien van de Weygaert, Bernard J. T. Jones +1
The cosmic web is the largest scale manifestation of the anisotropic gravitational collapse of matter. It represents the transitional stage between linear and non-linear structures…
Herschel-ATLAS/GAMA:How does the far-IR luminosity function depend on galaxy group properties?
Qi Guo, Cedric Lacey, Peder Norberg +14
We use the Herschel ATLAS (H-ATLAS) Phase I data to study the conditional luminosity function of far-IR (250 um) selected galaxies in optically-selected galaxy groups from the GAMA…
A clear and measurable signature of modified gravity in the galaxy velocity field
Wojciech A. Hellwing, Alexandre Barreira, Carlos S. Frenk +2
The velocity field of dark matter and galaxies reflects the continued action of gravity throughout cosmic history. We show that the low-order moments of the pairwise velocity distr…