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Testing the theory of gravity with DESI: estimators, predictions and simulation requirements
Shadab Alam, Christian Arnold, Alejandro Aviles +33
Shortly after its discovery, General Relativity (GR) was applied to predict the behavior of our Universe on the largest scales, and later became the foundation of modern cosmology.…
Dynamical friction in Bose-Einstein condensed self-interacting dark matter at finite temperatures, and the Fornax dwarf spheroidal
S. T. H. Hartman, H. A. Winther, D. F. Mota
The aim of the present work is to better understand the gravitational drag forces, i.e. dynamical friction, acting on massive objects moving through a self-interacting Bose-Einstei…
Testing Gravity on Cosmic Scales: A Case Study of Jordan-Brans-Dicke Theory
Shahab Joudaki, Pedro G. Ferreira, Nelson A. Lima +1
We provide an end-to-end exploration of a distinct modified gravitational theory in Jordan-Brans-Dicke (JBD) gravity, from an analytical and numerical description of the background…
Solitons in the dark: non-linear structure formation with fuzzy dark matter
Mattia Mina, David F. Mota, Hans A. Winther
We present the results of a full cosmological simulation with the new code SCALAR, where dark matter is in form of fuzzy dark matter, described by a light scalar field with a mass…
Investigating Cosmological GAN Emulators Using Latent Space Interpolation
Andrius Tamosiunas, Hans A. Winther, Kazuya Koyama +3
Generative adversarial networks (GANs) have been recently applied as a novel emulation technique for large scale structure simulations. Recent results show that GANs can be used as…
Testing Low-Redshift Cosmic Acceleration with Large-Scale Structure
Seshadri Nadathur, Will J. Percival, Florian Beutler +1
We examine the cosmological implications of measurements of the void-galaxy cross-correlation at redshift combined with baryon acoustic oscillation (BAO) data at $0.1<z<2.…