Jens Stücker

JZ-Tree: GPU friendly neighbour search and friends-of-friends with dual tree walks in JAX plus CUDA

Jens Stücker, Oliver Hahn, Lukas Winkler, A. G. Adame et autres

Algorithms based on spatial tree traversal are widely regarded as among the most efficient and flexible approaches for many problems in CPU-based high-performance computing (HPC). However, directly transferring these algorithms to GPU architectures often yields substantially smaller performance gains than expected in …

JZ-Tree: GPU friendly neighbour search and friends-of-friends with dual tree walks in JAX plus CUDA

Jens Stücker, Oliver Hahn, Lukas Winkler, A. G. Adame et autres

Algorithms based on spatial tree traversal are widely regarded as among the most efficient and flexible approaches for many problems in CPU-based high-performance computing (HPC). However, directly transferring these algorithms to GPU architectures often yields substantially smaller performance gains than expected in …

at (code pays fourni par la source)

STRAWBERRY: Finding haloes in the gravitational potential

T. R. G. Richardson, Jens Stücker, Raul E. Angulo

We present a novel algorithm that discriminates between bound and unbound particles by consideration of the gravitational potential from an accelerated reference frame, also referred to as the ‘boosted potential’. Particles are considered to be bound if their energy does not exceed …

es, at (code pays fourni par la source)

STRAWBERRY: Finding haloes in the gravitational potential

T. R. G. Richardson, Jens Stücker, Raúl E. Angulo

We present a novel algorithm that discriminates between bound and unbound particles by consideration of the gravitational potential from an accelerated reference frame, also referred to as the ‘boosted potential’. Particles are considered to be bound if their energy does not exceed …

es, at (code pays fourni par la source)

STRAWBERRY: Finding haloes in the gravitational potential

T. R. G. Richardson, Jens Stücker, Raul E. Angulo

We present a novel algorithm that discriminates between bound and unbound particles by consideration of the gravitational potential from an accelerated reference frame, also referred to as the ‘boosted potential’. Particles are considered to be bound if their energy does not exceed …

es, at (code pays fourni par la source)

Excursion sets with a ‘perfect’ collapse model

A. M. Wisłocka, Jens Stücker, Oliver Hahn, Raúl E. Angulo

ABSTRACT The Lambda cold dark matter model predicts structure formation across a vast mass range, from massive clusters ($\sim 10^{15}\, \text{M}_\odot$) to Earth-mass micro-haloes ($\sim 10^{-6} \, \text{M}_\odot$), resolving which far exceeds the capabilities of current simulations. Excursion set models are the …

at, es (code pays fourni par la source)

Probabilistic Lagrangian bias estimators and the cumulant bias expansion

Jens Stücker, Marcos Pellejero-Ibáñez, Raúl E. Angulo, Francisco Maion et autres

The spatial distribution of galaxies is a highly complex phenomenon that is impossible to predict deterministically at present. However, by using a statistical ‘bias’ relation, it has become feasible to robustly model the average abundance of galaxies as a function of the …

Probabilistic estimators of Lagrangian shape biases: Universal relations and physical insights

Francisco Germano Maion, Jens Stücker, Raúl E. Angulo

The intrinsic alignment of galaxies can provide valuable information for cosmological and astrophysical studies and is crucial for interpreting weak-lensing observations. Modeling intrinsic alignments requires understanding how galaxies acquire their shapes in relation to the large-scale gravitational field, which is typically encoded …

Non-halo structures and their effects on gravitationally lensed galaxies

Baptiste Jego, Giulia Despali, Tamara Richardson, Jens Stücker

While the lambda cold dark matter (ΛCDM) model is very successful on large scales, its validity on smaller scales remains uncertain. Recent works suggest that non-halo dark matter structures, such as filaments and walls, could significantly influence gravitational lensing and that the …

Non-halo structures and their effects on gravitationally lensed galaxies

Baptiste Jego, Giulia Despali, T. R. G. Richardson, Jens Stücker

While the lambda cold dark matter (ΛCDM) model is very successful on large scales, its validity on smaller scales remains uncertain. Recent works suggest that non-halo dark matter structures, such as filaments and walls, could significantly influence gravitational lensing and that the …

fr, de, it, es, at (code pays fourni par la source)

Gaussian Lagrangian galaxy bias

Jens Stücker, Marcos Pellejero-Ibáñez, Rodrigo Voivodic, Raúl E. Angulo

Understanding galaxy bias – that is, the statistical relation between matter and galaxies – is of key importance for extracting cosmological information from galaxy surveys. While the ‘bias function’, f – the probability of forming galaxies in a region with a given …

es, gb (code pays fourni par la source)

Gaussian Lagrangian galaxy bias

Jens Stücker, Marcos Pellejero-Ibáñez, Rodrigo Voivodic, Raul E. Angulo

Understanding galaxy bias – that is, the statistical relation between matter and galaxies – is of key importance for extracting cosmological information from galaxy surveys. While the ‘bias function’, f – the probability of forming galaxies in a region with a given …