3.7k citations · 7.6k across the 48 of their papers we have counts for
48 papers
Expanding stellar associations as Galactic accelerometers
Till Sawala, Núria Miret Roig
The gravitational potential of the Milky Way is fundamental for understanding the evolution of our Galaxy and the nature of dark matter. We introduce a new method to constrain the…
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…
Stellar Cores Live Long and Prosper in Cuspy Dark Matter Halos
Jenni Häkkinen, Alexander Rawlings, Till Sawala +1
The existence of cuspy or cored centers of dark matter halos is a crucial discriminant between different dark matter models. It has recently been claimed based on dynamical argumen…
Planes of satellites, at once transient and persistent
Till Sawala
The appearance of highly anisotropic planes of satellites around the Milky Way and other galaxies was long considered a challenge to the standard cosmological model. Some recent si…
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…
Apocalypse When? No Certainty of a Milky Way -- Andromeda Collision
Till Sawala, Jehanne Delhomelle, Alis J. Deason +5
It is commonly believed that our own Milky Way is on a collision course with the neighbouring Andromeda galaxy. As a result of their merger, predicted in around five billion years,…
Distinct distributions of elliptical and disk galaxies across the Local Supercluster as a CDM prediction
Till Sawala, Carlos Frenk, Jens Jasche +2
Galaxies of different types are not equally distributed in the Local Universe. In particular, the supergalactic plane is prominent among the brightest ellipticals, but inconspicuou…
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…
Modelling the accretion and feedback of supermassive black hole binaries in gas-rich galaxy mergers
Shihong Liao, Peter H. Johansson, Matias Mannerkoski +6
We introduce a new model for the accretion and feedback of supermassive black hole (SMBH) binaries to the KETJU code, which enables us to resolve the evolution of SMBH binaries dow…
The Local Group's mass: probably no more than the sum of its parts
Till Sawala, Meri Teeriaho, Peter H. Johansson
The total mass of the Local Group (LG) and the masses of its primary constituents, the Milky Way and M31, are important anchors for several cosmological questions. In recent years,…
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 Milky Way's plane of satellites: consistent with CDM
Till Sawala, Marius Cautun, Carlos S. Frenk +7
The "plane of satellites problem" describes the arrangement of the Milky Way's 11 brightest satellite galaxies in a remarkably thin plane, possibly supported by rotation. This is i…
SIBELIUS-DARK: a galaxy catalogue of the Local Volume from a constrained realisation simulation
Stuart McAlpine, John C. Helly, Matthieu Schaller +7
We present SIBELIUS-DARK, a constrained realisation simulation of the local volume to a distance of 200~Mpc from the Milky Way. SIBELIUS-DARK is the first study of the \textit{Simu…
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…
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…
Tidal features of classical Milky Way satellites in a CDM universe
M. -Y. Wang, Azadeh Fattahi, Andrew P. Cooper +6
We use the APOSTLE cosmological hydrodynamic simulations to examine the effects of tidal stripping on cold dark matter (CDM) sub haloes that host three of the most luminous Milky W…
Post-Newtonian dynamical modeling of supermassive black holes in galactic-scale simulations
Antti Rantala, Pauli Pihajoki, Peter H. Johansson +3
We present KETJU, a new extension of the widely-used smoothed particle hydrodynamics simulation code GADGET-3. The key feature of the code is the inclusion of algorithmically regul…
Properties of Local Group galaxies in hydrodynamical simulations of sterile neutrino dark matter cosmologies
Mark R. Lovell, Sownak Bose, Alexey Boyarsky +10
We study galaxy formation in sterile neutrino dark matter models that differ signifi- cantly from both cold and from `warm thermal relic' models. We use the EAGLE code to carry out…
The oldest and most metal poor stars in the APOSTLE Local Group simulations
Else Starkenburg, Kyle A. Oman, Julio F. Navarro +5
We examine the spatial distribution of the oldest and most metal poor stellar populations of Milky Way-sized galaxies using the APOSTLE cosmological hydrodynamical simulations of t…