301 citations · 2.1k across the 77 of their papers we have counts for
7 papers · 1 filter
Skewness of matter distribution in clustering dark energy cosmologies
Hermano Velten, Raquel Emy Fazolo
We calculate the skewness (the third moment ) of matter distribution in dynamical dark energy cosmologies. We pay particular attention to the impact of dark energy perturbatio…
Is the Hubble diagram of quasars in tension with concordance cosmology?
Hermano Velten, Syrios Gomes
Recently Risaliti \& Lusso [Nature Astron. 3 (2019) 3 272] reported new measurements of the expansion rate of the Universe by constructing the Hubble diagram of 1598 quasars in the…
On (non-)dynamical dark energy
Winfried Zimdahl, Júlio Fabris, Hermano Velten +1
The current Universe is composed by a mixture of relativistic species, baryonic matter, dark matter and dark energy which evolve in a non-trivial way at perturbative level. An adva…
Modified Gravity Away from a CDM Background
Guilherme Brando, Felipe T. Falciano, Eric V. Linder +1
Within the effective field theory approach to cosmic acceleration, the background expansion can be specified separately from the gravitational modifications. We explore the impact…
On the existence of static spherically-symmetric objects in action-dependent Lagrangian theories
Julio C. Fabris, Hermano Velten, Aneta Wojnar
We study static symmetric solutions in the context of a gravitational theory based on a action-dependent Lagrangian. Such theory has been designed as a setup to implement dissipati…
The effective field theory of dark energy diagnostic of linear Horndeski theories after GW170817 and GRB170817A
Louis Perenon, Hermano Velten
We summarise the effective field theory of dark energy construction to explore observable predictions of linear Horndeski theories. Based on \cite{Perenon:2016blf}, we review the d…
Matter Growth in Imperfect Fluid Cosmology
Winfried Zimdahl, Hermano Velten, William C. Algoner
Extensions of Einstein's General Relativity (GR) can formally be given a GR structure in which additional geometric degrees of freedom are mapped on an effective energy-momentum te…