Viscous dark matter growth in (neo-)Newtonian cosmology

Velten H, Schwarz D, Fabris JC, Zimdahl W (2013)
Physical Review D 88(10): 103522.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Velten, H.; Schwarz, DominikUniBi ; Fabris, J. C.; Zimdahl, W.
Abstract / Bemerkung
We assume cold dark matter to possess a small bulk-viscous pressure which typically attenuates the growth of inhomogeneities. Explicit calculations, based on Eckart's theory of dissipative processes, reveal that for viscous cold dark matter the usual Newtonian approximation for perturbation scales smaller than the Hubble scale is no longer valid. We advocate the use of a neo-Newtonian approach which consistently incorporates pressure effects into the fluid dynamics and correctly reproduces the general relativistic dynamics. This result is of interest for numerical simulations of nonlinear structure formation involving nonstandard dark-matter fluids. We obtain upper limits on the magnitude of the viscous pressure by requiring that relevant perturbation amplitudes should grow sufficiently to enter the nonlinear stage.
Erscheinungsjahr
2013
Zeitschriftentitel
Physical Review D
Band
88
Ausgabe
10
Art.-Nr.
103522
ISSN
1550-7998
eISSN
1550-2368
Page URI
https://pub.uni-bielefeld.de/record/2657974

Zitieren

Velten H, Schwarz D, Fabris JC, Zimdahl W. Viscous dark matter growth in (neo-)Newtonian cosmology. Physical Review D. 2013;88(10): 103522.
Velten, H., Schwarz, D., Fabris, J. C., & Zimdahl, W. (2013). Viscous dark matter growth in (neo-)Newtonian cosmology. Physical Review D, 88(10), 103522. doi:10.1103/PhysRevD.88.103522
Velten, H., Schwarz, Dominik, Fabris, J. C., and Zimdahl, W. 2013. “Viscous dark matter growth in (neo-)Newtonian cosmology”. Physical Review D 88 (10): 103522.
Velten, H., Schwarz, D., Fabris, J. C., and Zimdahl, W. (2013). Viscous dark matter growth in (neo-)Newtonian cosmology. Physical Review D 88:103522.
Velten, H., et al., 2013. Viscous dark matter growth in (neo-)Newtonian cosmology. Physical Review D, 88(10): 103522.
H. Velten, et al., “Viscous dark matter growth in (neo-)Newtonian cosmology”, Physical Review D, vol. 88, 2013, : 103522.
Velten, H., Schwarz, D., Fabris, J.C., Zimdahl, W.: Viscous dark matter growth in (neo-)Newtonian cosmology. Physical Review D. 88, : 103522 (2013).
Velten, H., Schwarz, Dominik, Fabris, J. C., and Zimdahl, W. “Viscous dark matter growth in (neo-)Newtonian cosmology”. Physical Review D 88.10 (2013): 103522.
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arXiv: 1307.6536

Inspire: 1244297

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