301 citations · 2.1k across the 77 of their papers we have counts for
6 papers · 1 filter
Viscous Cosmology
C. M. S. Barbosa, J. C. Fabris, O. F. Piattella +2
We discuss the possibility to implement a viscous cosmological model, attributing to the dark matter component a behaviour described by bulk viscosity. Since bulk viscosity implies…
Degeneracy between warm and coupled cold dark matter: A clarifying note
Hermano Velten, Humberto A. Borges, Thiago R. P. Caramês
Wei et al [PRD 88, 043510 (2013)] have proposed the existence of a cosmological degeneracy between warm dark matter (WDM), modified gravity and coupled cold dark matter (CDM) cosmo…
Piercing the Vainshtein screen with anomalous gravitational wave speed: Constraints on modified gravity from binary pulsars
Jose Beltran Jimenez, Federico Piazza, Hermano Velten
By using observations of the Hulse-Taylor pulsar we constrain the gravitational wave (GW) speed to the level of . We apply this result to scalar-tensor theories that gener…
Neutron Stars in Rastall Gravity
A. M. Oliveira, H. E. S. Velten, J. C. Fabris +1
We calculate static and spherically symmetric solutions for the Rastall modification of gravity to describe Neutron Stars (NS). The key feature of the Rastall gravity is the non-co…
Large scale structure and ISW effect in decaying vacuum cosmology
H. Velten, H. A. Borges, S. Carneiro +2
The concordance particle creation model - a class of CDM cosmologies - is studied using large scale structure (LSS) formation, with particular attention to the integrated Sac…
Non-linear clustering during the BEC dark matter phase transition
Rodolfo C. de Freitas, Hermano Velten
Spherical collapse of the Bose-Einstein Condensate (BEC) dark matter model is studied in the Thomas Fermi approximation. The evolution of the overdensity of the collapsed region an…