High redshift constraints on extended logotropic models
Benaoum H.B. Chavanis P.-H. Luongo O. Muccino M. Quevedo H.
September 2023Elsevier B.V.
Astroparticle Physics
2023#151
A single logotropic fluid, responsible for the existence of the whole dark sector, is here extensively revised at intermediate redshifts. In particular, by investigating possible generalizations that conceptually overcome previous issues of standard logotropic scenarios, we fix bound over classes of logotropic models that exhibit additional terms in the equation of state. Employing σ8 measurements combined with low redshift data sets of Supernovae and Hubble observational data, we show the statistical significance of those extensions and their departure from the standard cosmological model. Evidences against generalized versions of logotropic models are, in particular, prompted. Our outcomes definitively show that any departure from the original logotropic model, including the Anton–Schmidt dark energy, are clearly disfavored at the level of perturbations and/or background cosmology. This indicates that, in order to have a logotropic fluid, plausible generalized versions of it would point out to reduce the complexity of the fluid itself, instead of adding extra terms.
Dark energy , Logotropic models
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Department of Applied Physics and Astronomy, University of Sharjah, United Arab Emirates
Laboratoire de Physique Théorique, université de Toulouse, CNRS, UPS, France
Università di Camerino, Via Madonna delle Carceri 9, Camerino, 62032, Italy
SUNY Polytechnic Institute, Utica, 13502, NY, United States
NNLOT, Al-Farabi Kazakh National University, Al-Farabi av. 71, Almaty, 050040, Kazakhstan
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, AP 70543, Ciudad de México, 04510, Mexico
Dipartimento di Fisica and ICRANet, Università di Roma “La Sapienza”, Roma, I-00185, Italy
Institute of Experimental and Theoretical Physics, Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
Department of Applied Physics and Astronomy
Laboratoire de Physique Théorique
Università di Camerino
SUNY Polytechnic Institute
NNLOT
Instituto de Ciencias Nucleares
Dipartimento di Fisica and ICRANet
Institute of Experimental and Theoretical Physics
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