All Outputs (14)

The MillenniumTNG Project: Intrinsic alignments of galaxies and halos (2023)
Journal Article

The intrinsic alignment (IA) of observed galaxy shapes with the underlying cosmic web is a source of contamination in weak lensing surveys. Sensitive methods to identify the IA signal will therefore need to be included in the upcoming weak lensing an... Read More about The MillenniumTNG Project: Intrinsic alignments of galaxies and halos.

The progenitor galaxies of stellar haloes as ‘failed’ Milky Ways (2023)
Journal Article

The stellar halo of the Milky Way records the history of its interactions with dwarf galaxies, whose subsequent destruction results in the formation of an extended stellar component. Recent works have suggested that galaxies with masses comparable to... Read More about The progenitor galaxies of stellar haloes as ‘failed’ Milky Ways.

Galaxy clustering from the bottom up: A Streaming Model emulator I (2023)
Journal Article

In this series of papers, we present a simulation-based model for the non-linear clustering of galaxies based on separate modelling of clustering in real space and velocity statistics. In the first paper, we present an emulator for the real-space cor... Read More about Galaxy clustering from the bottom up: A Streaming Model emulator I.

Cosmological structure formation and soliton phase transition in fuzzy dark matter with axion self-interactions (2023)
Journal Article

We investigate cosmological structure formation in fuzzy dark matter (FDM) with the attractive self-interaction (SI) with numerical simulations. Such a SI would arise if the FDM boson were an ultra-light axion, which has a strong CP symmetry-breaking... Read More about Cosmological structure formation and soliton phase transition in fuzzy dark matter with axion self-interactions.

The feasibility of constraining DM interactions with high-redshift observations by JWST (2022)
Journal Article

Observations of the high redshift universe provide a promising avenue for constraining the nature of the dark matter (DM). This will be even more true with the advent of the James Webb Space Telescope (JWST). We run cosmological simulations of galaxy... Read More about The feasibility of constraining DM interactions with high-redshift observations by JWST.

Modelling the galaxy–halo connection with machine learning (2022)
Journal Article

To extract information from the clustering of galaxies on non-linear scales, we need to model the connection between galaxies and haloes accurately and in a flexible manner. Standard halo occupation distribution (HOD) models make the assumption that... Read More about Modelling the galaxy–halo connection with machine learning.

Illustrating galaxy–halo connection in the DESI era with illustrisTNG (2022)
Journal Article

We employ the hydrodynamical simulation ILLUSTRISTNG to inform the galaxy–halo connection of the Luminous Red Galaxy (LRG) and Emission Line Galaxy (ELG) samples of the Dark Energy Spectroscopic Instrument (DESI) survey at redshift z ∼ 0.8. Specifica... Read More about Illustrating galaxy–halo connection in the DESI era with illustrisTNG.

Constructing high-fidelity halo merger trees in abacussummit (2022)
Journal Article

Tracking the formation and evolution of dark matter haloes is a critical aspect of any analysis of cosmological N-body simulations. In particular, the mass assembly of a halo and its progenitors, encapsulated in the form of its merger tree, serves as... Read More about Constructing high-fidelity halo merger trees in abacussummit.

Dynamics of intermediate-mass black holes wandering in the milky way galaxy using the illustris TNG50 simulation (2022)
Journal Article

The detection of Intermediate-Mass Black Holes (IMBHs) in dwarf galaxies is crucial to closing the gap in the wide mass distribution of black holes (⁠∼3M⊙ to ∼5×1010M⊙⁠). IMBHs originally located at the centre of dwarfs that later collide with the Mi... Read More about Dynamics of intermediate-mass black holes wandering in the milky way galaxy using the illustris TNG50 simulation.

AbacusHOD: a highly efficient extended multitracer HOD framework and its application to BOSS and eBOSS data (2021)
Journal Article

We introduce the ABACUSHOD model and present two applications of ABACUSHOD and the ABACUSSUMMIT simulations to observations. ABACUSHOD is a Halo Occupation Distribution (HOD) framework written in PYTHON that is particle-based, multitracer, highly gen... Read More about AbacusHOD: a highly efficient extended multitracer HOD framework and its application to BOSS and eBOSS data.

The halo light cone catalogues of AbacusSummit (2021)
Journal Article

We describe a method for generating halo catalogues on the light-cone using the ABACUSSUMMIT suite of N-body simulations. The main application of these catalogues is the construction of realistic mock galaxy catalogues and weak lensing maps on the sk... Read More about The halo light cone catalogues of AbacusSummit.

compaso: A new halo finder for competitive assignment to spherical overdensities (2021)
Journal Article

We describe a new method (COMPASO) for identifying groups of particles in cosmological N-body simulations. COMPASO builds upon existing spherical overdensity (SO) algorithms by taking into consideration the tidal radius around a smaller halo before c... Read More about compaso: A new halo finder for competitive assignment to spherical overdensities.

Galaxy assembly bias and large-scale distribution: a comparison between IllustrisTNG and a semi-analytic model (2021)
Journal Article

In this work, we compare large scale structure observables for stellar mass selected samples at z = 0, as predicted by two galaxy models, the hydrodynamical simulation IllustrisTNG and the Santa-Cruz semi-analytic model (SC-SAM). Although both models... Read More about Galaxy assembly bias and large-scale distribution: a comparison between IllustrisTNG and a semi-analytic model.

AbacusSummit: a massive set of high-accuracy, high-resolution N-body simulations (2021)
Journal Article

We present the public data release of the ABACUSSUMMIT cosmological N-body simulation suite, produced with the ABACUS N-body code on the Summit supercomputer of the Oak Ridge Leadership Computing Facility. ABACUS achieves O(10−5) median fractional fo... Read More about AbacusSummit: a massive set of high-accuracy, high-resolution N-body simulations.