Zobrazeno 1 - 10
of 4 025
pro vyhledávání: '"halo, density"'
Autor:
Min, Zhiwei, Xiao, Xu, Ding, Jiacheng, Xiao, Liang, Jiang, Jie, Wu, Donglin, Lin, Qiufan, Wang, Yang, Liu, Shuai, Chen, Zhixin, Li, Xiangru, Zhang, Jinqu, Zhang, Le, Li, Xiao-Dong
We propose a lightweight deep convolutional neural network (lCNN) to estimate cosmological parameters from simulated three-dimensional dark matter (DM) halo distributions and associated statistics. The training dataset comprises 2000 realizations of
Externí odkaz:
http://arxiv.org/abs/2404.09483
Autor:
Korkidis, Giorgos, Pavlidou, Vasiliki
Density profiles are important tools in galaxy cluster research, offering insights into clusters dynamical states and their relationship with the broader Universe. While these profiles provide valuable information about the matter content of the Univ
Externí odkaz:
http://arxiv.org/abs/2404.11183
AIMS. We derive the morphology of the stellar component in the outer halo volume, and search for possible overdensities due to substructures therein. METHODS. We made use of some of the data releases of the spectroscopic survey LAMOST DR8-DR9 in tand
Externí odkaz:
http://arxiv.org/abs/2402.05157
Publikováno v:
Phys. Rev. Lett. 132, 031001 (2024)
We use explainable neural networks to connect the evolutionary history of dark matter halos with their density profiles. The network captures independent factors of variation in the density profiles within a low-dimensional representation, which we p
Externí odkaz:
http://arxiv.org/abs/2305.03077
Autor:
Jung, Gabriel, Karagiannis, Dionysios, Liguori, Michele, Baldi, Marco, Coulton, William R, Jamieson, Drew, Verde, Licia, Villaescusa-Navarro, Francisco, Wandelt, Benjamin D.
Publikováno v:
Astrophys.J. 948 (2023) 2, 135
We study primordial non-Gaussian signatures in the redshift-space halo field on non-linear scales, using a quasi-maximum likelihood estimator based on optimally compressed power spectrum and modal bispectrum statistics. We train and validate the esti
Externí odkaz:
http://arxiv.org/abs/2211.07565
Publikováno v:
A&A 663, A93 (2022)
Recent studies have reported the detection of the galactic stellar halo wake and dipole triggered by the Large Magellanic Cloud (LMC), mirroring the corresponding response from dark matter (DM). These studies open up the possibility of adding constra
Externí odkaz:
http://arxiv.org/abs/2205.11386
Publikováno v:
A&A 667, A99 (2022)
We use a large N-body simulation to study the characteristic scales in the density gradient profiles in and around halos with masses ranging from $10^{12}$ to $10^{15} h^{-1}{\rm M_\odot}$. We investigate the profiles separately along the major (T_1)
Externí odkaz:
http://arxiv.org/abs/2206.12163
We perform N-body simulations for $f(T)$ gravity using the ME-Gadget code, in order to investigate for the first time the structure formation process in detail. Focusing on the power-law model, and considering the model-parameter to be consistent wit
Externí odkaz:
http://arxiv.org/abs/2204.06845
Autor:
Lucie-Smith, Luisa, Peiris, Hiranya V., Pontzen, Andrew, Nord, Brian, Thiyagalingam, Jeyan, Piras, Davide
The density profiles of dark matter halos are typically modeled using empirical formulae fitted to the density profiles of relaxed halo populations. We present a neural network model that is trained to learn the mapping from the raw density field con
Externí odkaz:
http://arxiv.org/abs/2203.08827
Autor:
Chen, Jianxiong, Chu, M. -C.
We study the density profile of a dwarf halo in the decaying dark matter (DDM) cosmology, using a new algorithm that resolves halo density profiles down to the innermost $700$ pc robustly with high efficiency. Following Schwarzschild's orbit-based me
Externí odkaz:
http://arxiv.org/abs/2011.13121