1 code implementation • 21 Apr 2020 • Andrius Tamosiunas, Hans A. Winther, Kazuya Koyama, David J. Bacon, Robert C. Nichol, Ben Mawdsley
Recent results show that GANs can be used as a fast, efficient and computationally cheap emulator for producing novel weak lensing convergence maps as well as cosmic web data in 2-D and 3-D.
Cosmology and Nongalactic Astrophysics Instrumentation and Methods for Astrophysics Computational Physics
1 code implementation • 11 Nov 2019 • Benjamin Bose, Hans A. Winther, Alkistis Pourtsidou, Santiago Casas, Lucas Lombriser, Qianli Xia, Matteo Cataneo
We test this approach against comoving Lagrangian acceleration simulation measurements performed in GR, DGP and $f(R)$ gravity and find that our method performs comparably or better to the dark matter TNS redshift space power spectrum model for dark matter.
Cosmology and Nongalactic Astrophysics
no code implementations • 1 Apr 2019 • Seshadri Nadathur, Paul M. Carter, Will J. Percival, Hans A. Winther, Julian Bautista
Combining void information with that from BAO and galaxy RSD in the same CMASS sample, we measure $D_A(0. 57)/r_s=9. 36\pm0. 07$ (at 0. 75% precision), $H(0. 57)r_s=(14. 03\pm0. 16)\;10^3$ kms$^{-1}$Mpc$^{-1}$ (1. 1%) and $f\sigma_8=0. 450\pm0. 019$ (4. 2%), consistent with cosmic microwave background (CMB) measurements from Planck.
Cosmology and Nongalactic Astrophysics
1 code implementation • 2 Mar 2017 • Hans A. Winther, Kazuya Koyama, Marc Manera, Bill S. Wright, Gong-Bo Zhao
We present a general parallelized and easy-to-use code to perform numerical simulations of structure formation using the COLA (COmoving Lagrangian Acceleration) method for cosmological models that exhibit scale-dependent growth at the level of first and second order Lagrangian perturbation theory.
Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology
2 code implementations • 25 Mar 2014 • Hans A. Winther, Pedro G. Ferreira
We propose a simple and computationally fast method for performing N-body simulations for a large class of modified gravity theories with a screening mechanism such as chameleons, symmetrons and galileons.
Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology
