Buscar
Mostrando ítems 61-70 de 100
Self-interacting dark matter in cosmology: Accurate numerical implementation and observational constraints
(IOP Publishing, 2021-10)
This paper presents a systematic and accurate treatment of the evolution of cosmological perturbations in self-interacting dark matter models, for particles which decoupled from the primordial plasma while relativistic. ...
Convenient filtering techniques for LIGO strain of the GW150914 event
(IOP Publishing, 2019-04-18)
We present a new strategy for the pre-processing filtering techniques of the LIGO strain of the GW150914 [1,2] event that intends to extract as much physical information as possible, minimizing the use of prior assumptions, ...
Pulsating white dwarfs: new insights
(Springer, 2019-09-03)
Stars are extremely important astronomical objects that constitute the pillars on which the Universe is built, and as such, their study has gained increasing interest over the years. White dwarf stars are not the exception. ...
Decoherence effect in neutrinos produced in microquasar jets
(IOP Publishing, 2018-04)
We study the effect of decoherence upon the neutrino spectra produced in microquasar jets. In order to analyse the precession of the polarization vector of neutrinos we have calculated its time evolution by solving the ...
Magnetic diffusion effects on the Ultra-High Energy Cosmic Ray spectrum and composition
(Iop Publishing, 2013-09)
We discuss the effects of diffusion of high energy cosmic rays in turbulent extra-galactic magnetic fields. We find an approximate expression for the low energy suppression of the spectrum of the different mass components ...
Binary pulsars as probes for spin-2 ultralight dark matter
(IOP Publishing, 2020-01)
Binary pulsars can be excellent probes of ultra-light dark matter. We consider the scenario where the latter is represented by a spin-2 field. The coherent oscillations of the dark matter field perturb the dynamics of ...
Supernovae neutrino detection via coherent scattering off silicon nuclei
(Elsevier Science, 2021-01)
Low-energy neutrinos are clean messengers from supernovae explosions and probably carry unique insights into the process of stellar evolution. We estimate the expected number of events considering coherent elastic scattering ...
The shape of the extragalactic cosmic ray spectrum from galaxy clusters
(IOP Publishing, 2016-08-05)
We study the diffusive escape of cosmic rays from a central source inside a galaxy cluster to obtain the suppression in the outgoing flux appearing when the confinement times get comparable or larger than the age of the ...
Crossing the phantom divide without phantom matter
(IOP Publishing, 2006-09)
A class of braneworld models can lead to phantom-like acceleration of the late universe, but without the need for any phantom matter. In the simplest models, the universe contains only cold dark matter and a cosmological ...
About the Cauchy problem in Stelle's quadratic gravity
(IOP Publishing, 2019-03)
The focus of the present work is on the Cauchy problem for the quadratic gravity models introduced in \cite{stelle,stelle2}. These are renormalizable higher order derivative models of gravity, but at cost of ghostly states ...