479 citations · 2.5k across the 28 of their papers we have counts for
6 papers · 1 filter
Extended Chameleons
Philippe Brax, Nicola Tamanini
We extend the chameleon models by considering Scalar-Fluid theories where the coupling between matter and the scalar field can be represented by a quadratic effective potential wit…
The Einstein static universe in Scalar-Fluid theories
Christian G. Boehmer, Nicola Tamanini, Matthew Wright
A new Lagrangian framework has recently been proposed to describe interactions between relativistic perfect fluids and scalar fields. In this paper we investigate the Einstein stat…
Scalar-Fluid theories: cosmological perturbations and large-scale structure
Tomi S. Koivisto, Emmanuel N. Saridakis, Nicola Tamanini
Recently a new Lagrangian framework was introduced to describe interactions between scalar fields and relativistic perfect fluids. This allows two consistent generalizations of cou…
On phenomenological models of dark energy interacting with dark matter
Nicola Tamanini
An interaction between dark matter and dark energy is usually introduced by a phenomenological modification of the matter conservation equations, while the Einstein equations are l…
Interacting quintessence from a variational approach Part II: derivative couplings
Christian G. Boehmer, Nicola Tamanini, Matthew Wright
We consider an original variational approach for building new models of quintessence interacting with dark or baryonic matter. The coupling is introduced at the Lagrangian level us…
Interacting quintessence from a variational approach Part I: algebraic couplings
Christian G. Boehmer, Nicola Tamanini, Matthew Wright
We present a new approach to build models of quintessence interacting with dark or baryonic matter. We use a variational approach for relativistic fluids to realize an effective de…