@article{30289ed2fe5941169c35690b0b8d8240,
title = "Is the cosmological dark sector better modeled by a generalized Chaplygin gas or by a scalar field?",
abstract = "Both scalar fields and (generalized) Chaplygin gases have been widely used separately to characterize the dark sector of the universe. Here we investigate the cosmological background dynamics for a mixture of both these components and quantify the fractional abundances that are admitted by observational data from supernovae of type Ia and from the evolution of the Hubble rate. Moreover, we study how the growth rate of (baryonic) matter perturbations is affected by the dark-sector perturbations.",
author = "{del Campo}, Sergio and Fabris, {J{\'u}lio C.} and Ram{\'o}n Herrera and Winfried Zimdahl",
note = "Funding Information: This work was supported by the “Comisi{\'o}n Nacional de Ciencias y Tecnolog{\'i}a” (Chile) through the FONDECYT Grant No. 1130628 (R.H.). J.C.F and W.Z acknowledge support by “FONDECYT-Concurso incentivo a la Cooperaci{\'o}n Internacional” No. 1130628 as well as by CNPq (Brazil) and FAPES (Brazil). Sadly, shortly after this paper was started Prof. Sergio del Campo, unexpectedly, passed away. JF, RH and WZ dedicate this paper to his Memory. Publisher Copyright: {\textcopyright} 2017, The Author(s).",
year = "2017",
month = jul,
day = "1",
doi = "10.1140/epjc/s10052-017-5051-y",
language = "English",
volume = "77",
journal = "European Physical Journal C",
issn = "1434-6044",
number = "7",
}