JEANS INSTABILITY IN THE PRESENCE OF VISCOUS EFFECTS-Reference-Cited by-同舟云学术

JEANS INSTABILITY IN THE PRESENCE OF VISCOUS EFFECTS

Published:2009-08 Issue:08 Volume:18 Page:1257-1272
ISSN:0218-2718
Container-title:International Journal of Modern Physics D
language:en
Short-container-title:Int. J. Mod. Phys. D

Author:

CARLEVARO NAKIA¹²,MONTANI GIOVANNI³⁴⁵

Affiliation:

1. Department of Physics, Polo Scientifico – Università degli Studi di Firenze, INFN – Florence, Via G. Sansone, 1 (50019), Sesto Fiorentino (FI), Italy

2. ICRA, c/o Department of Physics, "Sapienza" University of Rome, Italy

3. ICRA, c/o Department of Physics, "Sapienza" University of Rome, Department of Physics, "Sapienza" Università di Roma, Piazza A. Moro, 5 (00185), Roma, Italy

4. ENEA – C.R. Frascati (Dept. F.P.N.), Via E. Fermi, 45 (00044), Frascati (RM), Italy

5. ICRANet – C.C. Pescara, Piazzale della Repubblica, 10 (65100), Pescara, Italy

Abstract

An analysis of gravitational instability in the presence of dissipative effects made. In particular, the standard Jeans mechanism and the generalization in treating the universe expansion are both analyzed when bulk viscosity affects the first-order Newtonian dynamics. As results, the perturbation evolution is found to be damped by dissipative processes and the top-down mechanism of structure fragmentation is suppressed. In such a scheme, the value of the Jeans mass remains unchanged also in the presence of viscosity.

Publisher

World Scientific Pub Co Pte Lt

Subject

Space and Planetary Science,Astronomy and Astrophysics,Mathematical Physics

Link

https://www.worldscientific.com/doi/pdf/10.1142/S0218271809015060

Reference23 articles.

1. STUDY OF THE QUASI-ISOTROPIC SOLUTION NEAR THE COSMOLOGICAL SINGULARITY IN THE PRESENCE OF BULK VISCOSITY

2. BULK VISCOSITY EFFECTS ON THE EARLY UNIVERSE STABILITY

3. I. The stability of a spherical nebula

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