We present for the first time a suite of cosmological simulations for a particular class of interacting Dark Energy cosmologies characterized by a background expansion history constrained to be indistinguishable from ?CDM. Such Constrained Interacting Dark Energy scenario - or CIDER - has been recently proposed in the literature and has the appealing feature of suppressing structure formation at late times, thereby possibly alleviating the persisting sigma(8) tension while leaving background observables unaffected. A crucial step to assess the viability of such scenarios is then represented by quantifying their impact on structure formation at non-linear scales, which is what we start investigating with the simulations discussed in the present work. We show that - for reasonable parameter choices - the reconstructed scalar potential is close to an exponential for most of the matter dominated epoch, and that the non-linear evolution of structures in these models imprints specific footprints on matter and halo statistics that may allow to break degeneracies with standard cosmological parameters.
Baldi, M. (2023). The CIDER simulations: non-linear structure formation in the constrained interacting dark energy scenario. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 521(1), 613-629 [10.1093/mnras/stad427].
The CIDER simulations: non-linear structure formation in the constrained interacting dark energy scenario
Baldi, Marco
Primo
2023
Abstract
We present for the first time a suite of cosmological simulations for a particular class of interacting Dark Energy cosmologies characterized by a background expansion history constrained to be indistinguishable from ?CDM. Such Constrained Interacting Dark Energy scenario - or CIDER - has been recently proposed in the literature and has the appealing feature of suppressing structure formation at late times, thereby possibly alleviating the persisting sigma(8) tension while leaving background observables unaffected. A crucial step to assess the viability of such scenarios is then represented by quantifying their impact on structure formation at non-linear scales, which is what we start investigating with the simulations discussed in the present work. We show that - for reasonable parameter choices - the reconstructed scalar potential is close to an exponential for most of the matter dominated epoch, and that the non-linear evolution of structures in these models imprints specific footprints on matter and halo statistics that may allow to break degeneracies with standard cosmological parameters.File | Dimensione | Formato | |
---|---|---|---|
Baldi - 2023 - The CIDER simulations non-linear structure format.pdf
accesso aperto
Tipo:
Versione (PDF) editoriale
Licenza:
Licenza per accesso libero gratuito
Dimensione
1.89 MB
Formato
Adobe PDF
|
1.89 MB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.