Search Results for author: Frédéric Courbin

Found 2 papers, 2 papers with code

Cosmic dissonance: new physics or systematics behind a short sound horizon?

1 code implementation17 Sep 2019 Nikki Arendse, Radosław J. Wojtak, Adriano Agnello, Geoff C. -F. Chen, Christopher D. Fassnacht, Dominique Sluse, Stefan Hilbert, Martin Millon, Vivien Bonvin, Kenneth C. Wong, Frédéric Courbin, Sherry H. Suyu, Simon Birrer, Tommaso Treu, Leon V. E. Koopmans

Results from time-delay lenses are consistent with those from distance-ladder calibrations and point to a discrepancy between absolute distance scales measured from the CMB (assuming the standard cosmological model) and late-time observations.

Cosmology and Nongalactic Astrophysics

Weak-lensing shear measurement with machine learning: teaching artificial neural networks about feature noise

1 code implementation5 Jul 2018 Malte Tewes, Thibault Kuntzer, Reiko Nakajima, Frédéric Courbin, Hendrik Hildebrandt, Tim Schrabback

A challenging peculiarity of this ML application is the combination of the noisiness of the input features and the requirements on the accuracy of the inverse regression.

Cosmology and Nongalactic Astrophysics Machine Learning

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