no code implementations • 25 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.
no code implementations • 25 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
1 code implementation • 22 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