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Oliver F. Piattella

Researcher at Universidade Federal do Espírito Santo

Publications -  137
Citations -  2502

Oliver F. Piattella is an academic researcher from Universidade Federal do Espírito Santo. The author has contributed to research in topics: Scalar field & Dark matter. The author has an hindex of 27, co-authored 130 publications receiving 2199 citations. Previous affiliations of Oliver F. Piattella include Heidelberg University & National Council for Scientific and Technological Development.

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Unified Dark Matter scalar field models with fast transition

TL;DR: In this paper, the authors investigate the general properties of Unified Dark Matter (UDM) scalar field models with Lagrangians with a non-canonical kinetic term, looking specifically for models that can produce a fast transition between an early Einstein-de Sitter CDM-like era and a later Dark Energy like phase, similarly to the barotropic fluid UDM models.
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Does Chaplygin gas have salvation

TL;DR: In this article, the generalized Chaplygin gas model is used to study the relationship between background kinematic tests and those related to the evolution of small perturbations, and it is shown that these tests favor negative values of the parameter α, which are unacceptable from the point of view of structure formation.
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The extreme limit of the generalised Chaplygin gas

TL;DR: In this paper, the authors investigated the Integrated Sachs-Wolfe effect for the generalised Chaplygin gas and found that it does not fit the model for 10−3 < α < 350.
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Observational constraints on Rastall's cosmology

TL;DR: In this paper, the authors test Rastall's theory in cosmology, on a flat Robertson-Walker metric, investigating a two-fluid model and using the type Ia supernovae Constitution dataset.
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The extreme limit of the generalized Chaplygin gas

TL;DR: In this article, the authors investigated the Integrated Sachs-Wolfe effect for the generalised Chaplygin gas and found that it does not fit the model for large values of α < 350.