Zobrazeno 1 - 10
of 220
pro vyhledávání: '"Hellwing, Wojciech"'
Autor:
Jalan, Priyanka, Bilicki, Maciej, Hellwing, Wojciech A., Wright, Angus H., Dvornik, Andrej, Heymans, Catherine, Hildebrandt, Hendrik, Joudaki, Shahab, Kuijken, Konrad, Mahony, Constance, Nakoneczny, Szymon Jan, Radovich, Mario, Busch, Jan Luca van den, Yoon, Mijin
We present a method to refine photometric redshift galaxy catalogs by comparing their color-space matching with overlapping spectroscopic calibration data. We focus on cases where photometric redshifts (photo-$z$) are estimated empirically. Identifyi
Externí odkaz:
http://arxiv.org/abs/2409.14799
Using the high-resolution \Nbody{} cosmological simulation COLOR, we explore the cosmic web (CW) environmental effects on subhalo populations and their internal properties. We use \cactus{}, a new implementation of the state-of-the-art segmentation m
Externí odkaz:
http://arxiv.org/abs/2409.09226
Autor:
Miro-Carretero, Juan, Gomez-Flechoso, Maria A., Martinez-Delgado, David, Cooper, Andrew P., Roca-Fabrega, Santi, Akhlaghi, Mohammad, Pillepich, Annalisa, Kuijken, Konrad, Erkal, Denis, Buck, Tobias, Hellwing, Wojciech A., Bose, Sownak, Donatiello, Giuseppe, Frenk, Carlos S.
According to the well established hierarchical framework for galaxy evolution, galaxies grow through mergers with other galaxies and the LambdaCDM cosmological model predicts that the stellar halos of massive galaxies are rich in remnants from minor
Externí odkaz:
http://arxiv.org/abs/2409.03585
This work investigates the impact of different Modified Gravity (MG) models on the large-scale structures (LSS) properties in relation to the cosmic web (CW), using N-body simulations of f(R) and nDGP models. We analyse the impact of the MG effect on
Externí odkaz:
http://arxiv.org/abs/2408.13219
In cosmological analyses, precise redshift determination remains pivotal for understanding cosmic evolution. However, with only a fraction of galaxies having spectroscopic redshifts (spec-$z$s), the challenge lies in estimating redshifts for a larger
Externí odkaz:
http://arxiv.org/abs/2312.08043
Dynamics of pairwise motions in the fully non-linear regime in LCDM and Modified Gravity cosmologies
Autor:
Jaber, Mariana, Hellwing, Wojciech A., García-Farieta, Jorge E., Gupta, Suhani, Bilicki, Maciej
In contrast to our understanding of density field tracers, the modelling of direct statistics pertaining to the cosmic velocity field remains open to significant opportunities for improvement. The lack of accurate modelling for the non-linear domain
Externí odkaz:
http://arxiv.org/abs/2312.00472
Wide-area deep imaging surveys have discovered large numbers of extremely low surface brightness dwarf galaxies, which challenge galaxy formation theory and, potentially, offer new constraints on the nature of dark matter. Here we discuss one as-yet
Externí odkaz:
http://arxiv.org/abs/2306.17454
Autor:
Pfeifer, Simon, Valade, Aurélien, Gottlöber, Stefan, Hoffman, Yehuda, Libeskind, Noam I., Hellwing, Wojciech A.
The aim of cosmological simulations is to reproduce the properties of the observed Universe, serving as tools to test structure and galaxy formation models. Constrained simulations of our local cosmological region up to a few hundred Mpc/h , the loca
Externí odkaz:
http://arxiv.org/abs/2305.05694
Autor:
Jaber, Mariana, Peper, Marius, Hellwing, Wojciech A., Aragon-Calvo, Miguel Angel, Valenzuela, Octavio
Voids possess a very complex internal structure and dynamics. Using $N$-body simulations we study the hierarchical nature of sub-structures present in the cosmic web (CW). We use the SpineWeb method which provides a complete characterization of the C
Externí odkaz:
http://arxiv.org/abs/2304.14387
Reliable analytical modeling of the non-linear power spectrum (PS) of matter perturbations is among the chief pre-requisites for cosmological analyses from the largest sky surveys. This is especially true for the models that extend the standard gener
Externí odkaz:
http://arxiv.org/abs/2301.12016