The kinetic gas universe

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Autorschaft

  • Manuel Hohmann
  • Christian Pfeifer
  • Nicoleta Voicu

Externe Organisationen

  • University of Tartu
  • Transilvania University of Brasov
Forschungs-netzwerk anzeigen

Details

OriginalspracheEnglisch
Aufsatznummer809
FachzeitschriftEuropean Physical Journal C
Jahrgang80
Ausgabenummer9
PublikationsstatusVeröffentlicht - 2 Sept. 2020
Extern publiziertJa

Abstract

A description of many-particle systems, which is more fundamental than the fluid approach, is to consider them as a kinetic gas. In this approach the dynamical variable in which the properties of the system are encoded, is the distribution of the gas particles in position and velocity space, called 1-particle distribution function (1PDF). However, when the gravitational field of a kinetic gas is derived via the Einstein-Vlasov equations, the information about the velocity distribution of the gas particles is averaged out and therefore lost. We propose to derive the gravitational field of a kinetic gas directly from its 1PDF, taking the velocity distribution fully into account. We conjecture that this refined approach could possibly account for the observed dark energy phenomenology.

ASJC Scopus Sachgebiete

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The kinetic gas universe. / Hohmann, Manuel; Pfeifer, Christian; Voicu, Nicoleta.
in: European Physical Journal C, Jahrgang 80, Nr. 9, 809, 02.09.2020.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Hohmann, M, Pfeifer, C & Voicu, N 2020, 'The kinetic gas universe', European Physical Journal C, Jg. 80, Nr. 9, 809. https://doi.org/10.1140/epjc/s10052-020-8391-y
Hohmann, M., Pfeifer, C., & Voicu, N. (2020). The kinetic gas universe. European Physical Journal C, 80(9), Artikel 809. https://doi.org/10.1140/epjc/s10052-020-8391-y
Hohmann M, Pfeifer C, Voicu N. The kinetic gas universe. European Physical Journal C. 2020 Sep 2;80(9):809. doi: 10.1140/epjc/s10052-020-8391-y
Hohmann, Manuel ; Pfeifer, Christian ; Voicu, Nicoleta. / The kinetic gas universe. in: European Physical Journal C. 2020 ; Jahrgang 80, Nr. 9.
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abstract = "A description of many-particle systems, which is more fundamental than the fluid approach, is to consider them as a kinetic gas. In this approach the dynamical variable in which the properties of the system are encoded, is the distribution of the gas particles in position and velocity space, called 1-particle distribution function (1PDF). However, when the gravitational field of a kinetic gas is derived via the Einstein-Vlasov equations, the information about the velocity distribution of the gas particles is averaged out and therefore lost. We propose to derive the gravitational field of a kinetic gas directly from its 1PDF, taking the velocity distribution fully into account. We conjecture that this refined approach could possibly account for the observed dark energy phenomenology.",
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AU - Voicu, Nicoleta

N1 - Funding information: C.P. and M.H. were supported by the Estonian Ministry for Education and Science through the Personal Research Funding Grants PSG489 (C.P.) and PRG356 (M.H.), as well as the European Regional Development Fund through the Center of Excellence TK133 “The Dark Side of the Universe”. The authors would like to acknowledge networking support by the COST Actions CANTATA (CA15117) and QGMM (CA18108), supported by COST (European Cooperation in Science and Technology). C.P. and M.H. were supported by the Estonian Ministry for Education and Science through the Personal Research Funding Grants PSG489 (C.P.) and PRG356 (M.H.), as well as the European Regional Development Fund through the Center of Excellence TK133 ?The Dark Side of the Universe?. The authors would like to acknowledge networking support by the COST Actions CANTATA (CA15117) and QGMM (CA18108), supported by COST (European Cooperation in Science and Technology).

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