Search Results for author: Julian Merten

Found 3 papers, 1 papers with code

On the dissection of degenerate cosmologies with machine learning

no code implementations25 Oct 2018 Julian Merten, Carlo Giocoli, Marco Baldi, Massimo Meneghetti, Austin Peel, Florian Lalande, Jean-Luc Starck, Valeria Pettorino

Based on the DUSTGRAIN-pathfinder suite of simulations, we investigate observational degeneracies between nine models of modified gravity and massive neutrinos.

BIG-bench Machine Learning General Classification +2

Distinguishing standard and modified gravity cosmologies with machine learning

no code implementations25 Oct 2018 Austin Peel, Florian Lalande, Jean-Luc Starck, Valeria Pettorino, Julian Merten, Carlo Giocoli, Massimo Meneghetti, Marco Baldi

We present a convolutional neural network to identify distinct cosmological scenarios based on the weak-lensing maps they produce.

Cosmology and Nongalactic Astrophysics

Weak lensing shear estimation beyond the shape-noise limit: a machine learning approach

1 code implementation22 Aug 2018 Ofer M. Springer, Eran O. Ofek, Yair Weiss, Julian Merten

In this work we report on our initial attempt to reduce statistical errors in weak lensing shear estimation using a machine learning approach -- training a multi-layered convolutional neural network to directly estimate the shear given an observed background galaxy image.

Cosmology and Nongalactic Astrophysics

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