Ruan, Cheng-Zong Hernández-Aguayo, César Li, Baojiu Arnold, Christian Baugh, Carlton M. Klypin, Anatoly Prada, Francisco
Published in
Journal of Cosmology and Astroparticle Physics
We present mg-glam, a code developed for the very fast production of full N-body cosmological simulations in modified gravity (MG) models. We describe the implementation, numerical tests and first results of a large suite of cosmological simulations for three classes of MG models with conformal coupling terms: the f(R) gravity, symmetron and couple...
Butter, Anja Finke, Thorben Keil, Felicitas Krämer, Michael Manconi, Silvia
Published in
Journal of Cosmology and Astroparticle Physics
The use of Bayesian neural networks is a novel approach for the classification of γ-ray sources. We focus on the classification of Fermi-LAT blazar candidates, which can be divided into BL Lacertae objects and Flat Spectrum Radio Quasars. In contrast to conventional dense networks, Bayesian neural networks provide a reliable estimate of the uncerta...
Wei, Shao-Wen Wang, Hui-Min Zhang, Yu-Peng Liu, Yu-Xiao
Published in
Journal of Cosmology and Astroparticle Physics
Recent study shows that the magnetic reconnection can serve as an efficient mechanism to extract energy from rapidly spinning black holes. In this paper, we consider the effects of the tidal charge on the energy extraction via the magnetic reconnection in the backgrounds of a spinning braneworld black hole. With the increase of the tidal charge, we...
Bartolo, Nicola Ganz, Alexander Matarrese, Sabino
Published in
Journal of Cosmology and Astroparticle Physics
We study the impact of (generalized) cuscuton models on standard single scalar field inflation. Generalized cuscuton models are characterized by spatial covariant gravity where a scalar degree of freedom is made non dynamical, and there are just two tensor degrees of freedom. The presence of the non-dynamical scalar field does not spoil inflation b...
Almeida, Juan P. Beltrán Motoa-Manzano, Josué Noreña, Jorge Pereira, Thiago S. Valenzuela-Toledo, César A.
Published in
Journal of Cosmology and Astroparticle Physics
We present an effective Eulerian description, in the non-relativistic regime, of the growth of cosmological perturbations around a homogeneous but anisotropic Bianchi I spacetime background. We assume a small deviation from isotropy, sourced at late times for example by dark energy anisotropic stress. We thus derive an analytic solution for the lin...
Bose, Debajit Maity, Tarak Nath Ray, Tirtha Sankar
Published in
Journal of Cosmology and Astroparticle Physics
Particulate dark matter captured by a population of neutron stars distributed around the galactic center while annihilating through long-lived mediators can give rise to an observable neutrino flux. We examine the prospect of an idealised gigaton detector like IceCube/KM3NeT in probing such scenarios. Within this framework, we report an improved re...
Gráf, Lukáš Jana, Sudip Kaladharan, Ajay Saad, Shaikh
Published in
Journal of Cosmology and Astroparticle Physics
We study the gravitational wave imprints of left-right symmetric model equipped with universal seesaw mechanism allowing for the natural generation of hierarchical masses of the Standard Model fermions. The scalar sector of this model is the minimal one, consisting of only two Higgs doublets. Following the construction of the full thermal potential...
Martin, Jérôme Micheli, Amaury Vennin, Vincent
Published in
Journal of Cosmology and Astroparticle Physics
In quantum information theory, quantum discord has been proposed as a tool to characterise the presence of “quantum correlations” between the subparts of a given system. Whether a system behaves quantum-mechanically or classically is believed to be impacted by the phenomenon of decoherence, which originates from the unavoidable interaction between ...
Piani, Matteo Rubio, Javier
Published in
Journal of Cosmology and Astroparticle Physics
We study the phenomenology of the Higgs-Dilaton model in the context of Einstein-Cartan gravity, focusing on the separate impact of the Holst and Nieh-Yan terms on the inflationary observables. Using analytical and numerical techniques, we show the predictions of these scenarios to display an attractor-like behaviour intrinsically related to the cu...
Tapadar, Ananya Ganguly, Sougata Roy, Sourov
Published in
Journal of Cosmology and Astroparticle Physics
In secluded dark sector scenario, the connection between the visible and the dark sector can be established through a portal coupling and its presence opens up the possibility of non-adiabatic evolution of the dark sector. To study the non-adiabatic evolution of the dark sector, we have considered a U(1) Lμ – Lτ ⊗ U(1) X extension of the standard m...
