3.7k citations · 7.6k across the 48 of their papers we have counts for
18 papers · 1 filter
The local galaxy distribution does not violate the cosmological principle
Till Sawala
The cosmological principle, which states that the Universe is statistically homogeneous and isotropic on sufficiently large scales, is a foundational assumption of the standard cos…
Cylindrical cosmological simulations with StePS
Gábor Rácz, Viola H. Varga, Balázs Pál +3
The global topology of the Universe can affect long-range gravitational forces via boundary conditions. Detailed studies of non-trivial topologies require simulations that natively…
The Giant Arc -- Filament or Figment?
Till Sawala, Meri Teeriaho
The so-called "Giant Arc" is a sparse pattern of MgII absorbers spanning approximately 740 comoving Mpc, whose discovery has been claimed to contradict the large-scale homogeneity…
The Emperor's New Arc: gigaparsec patterns abound in a CDM universe
Till Sawala, Meri Teeriaho, Carlos S. Frenk +5
Recent discoveries of apparent large-scale features in the structure of the universe, extending over many hundreds of megaparsecs, have been claimed to contradict the large-scale i…
The Timeless Timing Argument and the Mass of the Local Group
Till Sawala, Jorge Peñarrubia, Shihong Liao +1
The Timing Argument connects the motion of a two-body system to its mass in an expanding Universe with a finite age, under the assumption that it has evolved on a self-gravitating…
Velocity-dependent J-factors for Milky Way dwarf spheroidal analogues in cosmological simulations
Keagan Blanchette, Erin Piccirillo, Nassim Bozorgnia +5
We study the impact of the dark matter velocity distribution modelling on signals from velocity-dependent dark matter annihilation in Milky Way dwarf spheroidal galaxies. Using the…
The SIBELIUS Project: E Pluribus Unum
Till Sawala, Stuart McAlpine, Jens Jasche +4
We introduce "Simulations Beyond The Local Universe" (SIBELIUS) that connect the Local Group to its cosmic environment. We show that introducing hierarchical small-scale perturbati…
Setting the Stage: Structures from Gaussian Random Fields
Till Sawala, Adrian Jenkins, Stuart McAlpine +4
We study structure formation in a set of cosmological simulations to uncover the scales in the initial density field that gave rise to the formation of present-day structures. Our…
Structure Formation with Two Periods of Inflation: Beyond PLaIn CDM
Kari Enqvist, Till Sawala, Tomo Takahashi
We discuss structure formation in models with a spectator field in small-field inflation which accommodate a secondary period of inflation. In such models, subgalactic scale primor…
Dark matter annihilation radiation in hydrodynamic simulations of Milky Way haloes
Matthieu Schaller, Carlos S. Frenk, Tom Theuns +8
We obtain predictions for the properties of cold dark matter annihilation radiation using high resolution hydrodynamic zoom-in cosmological simulations of Milky Way-like galaxies (…
The Copernicus Complexio: a high-resolution view of the small-scale Universe
Wojciech A. Hellwing, Carlos S. Frenk, Marius Cautun +5
We introduce Copernicus Complexio (COCO), a high-resolution cosmological N-body simulation of structure formation in the model. COCO follows an approximately spheric…
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…
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…
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…
The abundance of (not just) dark matter haloes
Till Sawala, Carlos S. Frenk, Robert A. Crain +4
We study the effect of baryons on the abundance of structures and substructures in a Lambda-CDM cosmology, using a pair of high resolution cosmological simulations from the GIMIC p…
The Dynamical and Chemical Evolution of Dwarf Spheroidal Galaxies with GEAR
Yves Revaz, Pascale Jablonka
We present a fully parallel chemo-dynamical Tree/SPH code, GEAR, which allows to perform high resolution simulations with detailed chemical diagnostics. Starting from the public ve…
Local Group Dwarf Galaxies: Nature And Nurture
Till Sawala, Cecilia Scannapieco, Simon White
We investigate the formation and evolution of dwarf galaxies in a high resolution, hydrodynamical cosmological simulation of a Milky Way sized halo and its environment. Our simulat…
What is the (Dark) Matter with Dwarf Galaxies?
Till Sawala, Qi Guo, Cecilia Scannapieco +2
We present cosmological hydrodynamical simulations of the formation of dwarf galaxies in a representative sample of haloes extracted from the Millennium-II Simulation. Our six halo…