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  "authors": [
    {
      "raw_name": "Stichel, P. C.", 
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Fakult\u00e4t f\u00fcr Physik, Universit\u00e4t Bielefeld, 33501, Bielefeld, Germany"
        }
      ], 
      "surname": "Stichel", 
      "given_names": "P.C.", 
      "full_name": "Stichel, P.C."
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    {
      "raw_name": "Zakrzewski, W. J.", 
      "affiliations": [
        {
          "country": "UK", 
          "value": "Department of Mathematical Sciences, University of Durham, DH1 3LE, Durham, UK"
        }
      ], 
      "surname": "Zakrzewski", 
      "given_names": "W.J.", 
      "full_name": "Zakrzewski, W.J."
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  "record_creation_date": "2015-01-13T00:00:00", 
  "titles": [
    {
      "source": "Springer/Societ\u00e0 Italiana di Fisica", 
      "title": "General relativistic, nonstandard model for the dark sector of the Universe"
    }
  ], 
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    {
      "value": "10.1140/epjc/s10052-014-3218-3"
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  "publication_info": [
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      "journal_title": "European Physical Journal C", 
      "page_start": "9", 
      "material": "article", 
      "journal_issue": "1", 
      "year": 2015
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  "$schema": "http://repo.scoap3.org/schemas/hep.json", 
  "abstracts": [
    {
      "source": "Springer/SIF", 
      "value": "We present a general relativistic version of the self-gravitating fluid model for the dark sector of the Universe (darkon fluid) introduced in Stichel and Zakrzewski (Phys Rev D 80:083513, 2009 ) and extended and reviewed in Stichel and Zakrzewski (Entropy 15:559, 2013 ). This model contains no free parameters in its Lagrangian. The resulting energy-momentum tensor is dustlike with a nontrivial energy flow. In an approximation valid at sub-Hubble scales we find that the present-day cosmic acceleration is not attributed to any kind of negative pressure but it is due to a dynamically determined negative energy density. This property turns out to be equivalent to a time-dependent spatial curvature. The obtained cosmological equations, at sub-Hubble scales, agree with those of the nonrelativistic model but they are given a new physical interpretation. Furthermore, we have derived the self-consistent equation to be satisfied by the nonrelativistic gravitational potential produced by a galactic halo in our model from a weak-field limit of a generalized Tolman\u2013Oppenheimer\u2013Volkoff equation."
    }
  ], 
  "imprints": [
    {
      "date": "2015-01-14", 
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