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Part 1: Document Description
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Citation |
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Title: |
The Formulation of Scaling Expansion in an Euler-Poisson Dark-Fluid Model |
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Identification Number: |
hdl:21.15109/CONCORDA/VJSOOI |
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Distributor: |
ARP |
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Date of Distribution: |
2023-10-17 |
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Version: |
1 |
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Bibliographic Citation: |
Szigeti, Balázs Endre; Barna, Imre Ferenc; Barnaföldi, Gergely Gábor, 2023, "The Formulation of Scaling Expansion in an Euler-Poisson Dark-Fluid Model", https://hdl.handle.net/21.15109/CONCORDA/VJSOOI, ARP, V1 |
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Citation |
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Title: |
The Formulation of Scaling Expansion in an Euler-Poisson Dark-Fluid Model |
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Identification Number: |
hdl:21.15109/CONCORDA/VJSOOI |
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Authoring Entity: |
Szigeti, Balázs Endre (Wigner Research Centre for Physics) |
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Barna, Imre Ferenc (Wigner Research Centre for Physics) |
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Barnaföldi, Gergely Gábor (Wigner Research Centre for Physics) |
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Grant Number: |
OTKA K135515 |
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Grant Number: |
019-2.1.11-TET-2019-00078, |
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Grant Number: |
019-2.1.11-TET-2019-00050 |
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Grant Number: |
Wigner Scientific Computing Laboratory (WSCLAB) |
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Distributor: |
ARP |
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Access Authority: |
Barnaföldi, Gergely Gábor |
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Depositor: |
Barnaföldi, Gergely Gábor |
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Date of Deposit: |
2023-10-16 |
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Holdings Information: |
https://hdl.handle.net/21.15109/CONCORDA/VJSOOI |
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Study Scope |
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Keywords: |
Astronomy and Astrophysics, dark fluid, Sedov–Taylor Ansatz, self-similarity, scaling hidrodynamical solution |
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Abstract: |
We present a dark fluid model described as a non-viscous, non-relativistic, rotating, and self-gravitating fluid. We assume that the system has spherical symmetry and that the matter can be described by the polytropic equation of state. The induced coupled nonlinear partial differential system of equations was solved using a self-similar time-dependent ansatz introduced by L. Sedov and G.I. Taylor. These kinds of solutions were successfully used to describe blast waves induced by an explosion following the Guderley–Landau–Stanyukovich problem. We show that the result of our quasi-analytic solutions are fully consistent with the Newtonian cosmological framework. We analyzed relevant quantities from the model, namely, the evolution of the Hubble parameter and the density parameter ratio, finding that our solutions can be applied to describe normal-to-dark energy on the cosmological scale. |
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Data Access |
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Notes: |
Ask from the Authors |
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Other Study Description Materials |
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Related Publications |
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Citation |
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Title: |
Szigeti, B.E.; Barna, I.F.; Barnaföldi, G.G. The Formulation of Scaling Expansion in an Euler-Poisson Dark-Fluid Model. Universe 2023, 9, 431. |
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Identification Number: |
10.3390/universe9100431 |
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Bibliographic Citation: |
Szigeti, B.E.; Barna, I.F.; Barnaföldi, G.G. The Formulation of Scaling Expansion in an Euler-Poisson Dark-Fluid Model. Universe 2023, 9, 431. |
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AbraZetaPelda.pdf |
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application/pdf |
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DarkFluid_NonRot.nb |
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application/mathematica |
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HubbleLaw.pdf |
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NonRot.pdf |
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OmegaDe.pdf |
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Rot.pdf |
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RotatingDM_v3.tex |
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UniverseExample.pdf |
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Final published article |
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application/pdf |