TY - JOUR
T1 - Lagrangian formulation for an extended cosmological equation-of-state
AU - Panotopoulos, Grigoris
AU - Lopes, Ilídio
AU - RINCON RIVERO, ANGEL
N1 - Funding Information:
We wish to thank the anonymous reviewer for useful comments and suggestions. The authors G. P. and I. L. thank the Funda??o para a Ci?ncia e Tecnologia (FCT), Portugal, for the financial support to the Center for Astrophysics and Gravitation-CENTRA, Instituto Superior T?cnico, Universidade de Lisboa, through the Project No. UIDB/00099/2020 and No. PTDC/FIS-AST/28920/2017. The author A. R. acknowledges DI-VRIEA, Chile for financial support through Proyecto Postdoctorado 2019 VRIEA-PUCV.
Funding Information:
We wish to thank the anonymous reviewer for useful comments and suggestions. The authors G. P. and I. L. thank the Fundação para a Ciência e Tecnologia (FCT) , Portugal, for the financial support to the Center for Astrophysics and Gravitation-CENTRA, Instituto Superior Técnico, Universidade de Lisboa, through the Project No. UIDB/00099/2020 and No. PTDC/FIS-AST/28920/2017 . The author A. R. acknowledges DI-VRIEA, Chile for financial support through Proyecto Postdoctorado 2019 VRIEA-PUCV.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2021/1
Y1 - 2021/1
N2 - We show that the extended cosmological equation-of-state developed starting from a Chaplygin equation-of-state, recently applied to stellar modelling, is a viable dark energy model consistent with standard scalar potentials. Moreover we find a Lagrangian formulation based on a canonical scalar field with the appropriate self-interaction potential. Finally, we fit the scalar potential obtained numerically with concrete functions well studied in the literature. Our results may be of interest to model builders and particle physicists.
AB - We show that the extended cosmological equation-of-state developed starting from a Chaplygin equation-of-state, recently applied to stellar modelling, is a viable dark energy model consistent with standard scalar potentials. Moreover we find a Lagrangian formulation based on a canonical scalar field with the appropriate self-interaction potential. Finally, we fit the scalar potential obtained numerically with concrete functions well studied in the literature. Our results may be of interest to model builders and particle physicists.
UR - http://www.scopus.com/inward/record.url?scp=85106825453&partnerID=8YFLogxK
U2 - 10.1016/j.dark.2020.100751
DO - 10.1016/j.dark.2020.100751
M3 - Article
AN - SCOPUS:85106825453
VL - 31
JO - Physics of the Dark Universe
JF - Physics of the Dark Universe
SN - 2212-6864
M1 - 100751
ER -