Zobrazeno 1 - 10
of 3 485
pro vyhledávání: '"A. Stücker"'
The intrinsic alignment of galaxies is a key factor in modeling weak-lensing observations and can serve as a valuable signal for both cosmological and astrophysical studies. Modelling this signal requires understanding how galaxy shapes form, and the
Externí odkaz:
http://arxiv.org/abs/2409.14995
Understanding $\textit{galaxy bias}$ -- that is the statistical relation between matter and galaxies -- is of key importance for extracting cosmological information from galaxy surveys. While the bias function $f$ -- that is the probability of formin
Externí odkaz:
http://arxiv.org/abs/2405.01951
Autor:
Stücker, Jens, Pellejero-Ibáñez, Marcos, Angulo, Raul E., Maion, Francisco, Voivodic, Rodrigo
The spatial distribution of galaxies is a highly complex phenomenon currently impossible to predict deterministically. However, by using a statistical $\textit{bias}$ relation, it becomes possible to robustly model the average abundance of galaxies a
Externí odkaz:
http://arxiv.org/abs/2405.01950
Autor:
López-Cano, Daniel, Stücker, Jens, Ibañez, Marcos Pellejero, Angulo, Raúl E., Franco-Barranco, Daniel
Dark matter haloes form from small perturbations to the almost homogeneous density field of the early universe. Although it is known how large these initial perturbations must be to form haloes, it is rather poorly understood how to predict which par
Externí odkaz:
http://arxiv.org/abs/2311.12110
The first generation of haloes forms from the collapse of the smallest peaks in the initial density field. $N$-body simulations of this process suggest a prompt formation of a steep power-law cusp, but these calculations are plagued by numerical arti
Externí odkaz:
http://arxiv.org/abs/2309.05707
Prompt cusps are the densest quasi-equilibrium dark matter objects; one forms at the instant of collapse within every isolated peak of the initial cosmological density field. They have power-law density profiles, $\rho \propto r^{-1.5}$ with central
Externí odkaz:
http://arxiv.org/abs/2301.04670
Autor:
Mladenov, Kiril V.1,2 (AUTHOR) kiril.mladenov@kinderkrankenhaus.net, Stücker, Ralf1,2 (AUTHOR)
Publikováno v:
Cancers. Dec2024, Vol. 16 Issue 23, p4079. 23p.
Autor:
Aguirre-Santaella, Alejandra, Sánchez-Conde, Miguel A., Ogiya, Go, Stücker, Jens, Angulo, Raul E.
In this work, we carry out a suite of specially-designed numerical simulations to shed further light on dark matter (DM) subhalo survival at mass scales relevant for gamma-ray DM searches, a topic subject to intense debate nowadays. Specifically, we
Externí odkaz:
http://arxiv.org/abs/2207.08652
Autor:
Pellejero-Ibanez, Marcos, Angulo, Raul E., Zennaro, Matteo, Stuecker, Jens, Contreras, Sergio, Arico, Giovanni, Maion, Francisco
We present an emulator that accurately predicts the power spectrum of galaxies in redshift space as a function of cosmological parameters. Our emulator is based on a 2nd-order Lagrangian bias expansion that is displaced to Eulerian space using cosmol
Externí odkaz:
http://arxiv.org/abs/2207.06437
Autor:
Stücker, Jens, Ogiya, Go, Angulo, Raul E., Aguirre-Santaella, Alejandra, Sánchez-Conde, Miguel A.
We present a model for the remnants of haloes that have gone through an adiabatic tidal stripping process. We show that this model exactly reproduces the remnant of an NFW halo that is exposed to a slowly increasing isotropic tidal field and approxim
Externí odkaz:
http://arxiv.org/abs/2207.00604