75 citations · 141 across the 7 of their papers we have counts for
7 papers
Dark Degeneracy in DESI DR2: Interacting or Evolving Dark Energy?
Vitor Petri, Valerio Marra, Rodrigo von Marttens
The standard CDM model, despite its success, is challenged by persistent observational tensions in the Hubble constant () and the matter clustering amplitude (), motiv…
The matter with(in) CPL
Leonardo Giani, Rodrigo Von Marttens, Oliver Fabio Piattella
We introduce a two-parameter phenomenological extension of the CDM model in which the equation of state parameter of the ``dust'' fluid becomes different from zero for redshifts…
The catalogue of virtual early-type galaxies from IllustrisTNG: validation and real observation consistency
Pedro de Araujo Ferreira, Nicola R. Napolitano, Luciano Casarini +3
Early-type galaxies (ETGs) are reference systems to understand galaxy formation and evolution processes. The physics of their formation and internal dynamics are codified in well-k…
A novel approach to cosmological non-linearities as an effective fluid
Leonardo Giani, Rodrigo Von Marttens, Ryan Camilleri
We propose a two parameters extension of the flat CDM model to capture the impact of matter inhomogeneities on our cosmological inference. Non virialized but non-linearly evolvi…
Cosmological constraints on parametrized interacting dark energy
R. von Marttens, L. Casarini, D. F. Mota +1
We reconsider the dynamics of the Universe in the presence of interactions in the cosmological dark sector. A class of interacting models is introduced via a real function $f\left(…
On general features of warm dark matter with reduced relativistic gas
W. S. Hipolito-Ricaldi, R. F. vom Marttens, J. C. Fabris +2
Reduced Relativistic Gas (RRG) is a useful approach to describe the warm dark matter (WDM) or the warmness of baryonic matter in the approximation when the interaction between the…
Baryonic matter perturbations in decaying vacuum cosmology
R. F. vom Marttens, W. S. Hipólito-Ricaldi, W. Zimdahl
We consider the perturbation dynamics for the cosmic baryon fluid and determine the corresponding power spectrum for a CDM model in which a cosmological term decays into dark…