Search Results for author: Janis Fluri

Found 4 papers, 1 papers with code

DeepLSS: breaking parameter degeneracies in large scale structure with deep learning analysis of combined probes

1 code implementation17 Mar 2022 Tomasz Kacprzak, Janis Fluri

Galaxy bias $b_g$ is improved by 1. 5x, stochasticity $r_g$ by 3x, and the redshift evolution $\eta_{\rm{IA}}$ and $\eta_b$ by 1. 6x.

Clustering

Cosmological constraints with deep learning from KiDS-450 weak lensing maps

no code implementations7 Jun 2019 Janis Fluri, Tomasz Kacprzak, Aurelien Lucchi, Alexandre Refregier, Adam Amara, Thomas Hofmann, Aurel Schneider

We present the cosmological results with a CNN from the KiDS-450 tomographic weak lensing dataset, constraining the total matter density $\Omega_m$, the fluctuation amplitude $\sigma_8$, and the intrinsic alignment amplitude $A_{\rm{IA}}$.

Cosmology and Nongalactic Astrophysics

Cosmological constraints from noisy convergence maps through deep learning

no code implementations23 Jul 2018 Janis Fluri, Tomasz Kacprzak, Aurelien Lucchi, Alexandre Refregier, Adam Amara, Thomas Hofmann

We find that, for a shape noise level corresponding to 8. 53 galaxies/arcmin$^2$ and the smoothing scale of $\sigma_s = 2. 34$ arcmin, the network is able to generate 45% tighter constraints.

Cosmology and Nongalactic Astrophysics

Fast cosmic web simulations with generative adversarial networks

no code implementations27 Jan 2018 Andres C. Rodriguez, Tomasz Kacprzak, Aurelien Lucchi, Adam Amara, Raphael Sgier, Janis Fluri, Thomas Hofmann, Alexandre Réfrégier

Computational models of the underlying physical processes, such as classical N-body simulations, are extremely resource intensive, as they track the action of gravity in an expanding universe using billions of particles as tracers of the cosmic matter distribution.

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