Jeans instability in the presence of viscous effects

Nakia Carlevaro, Giovanni Montani

Research output: Contribution to journalArticle

9 Citations (Scopus)


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. © 2009 World Scientific Publishing Company.
Original languageEnglish
Pages (from-to)1257 - 1272
Number of pages16
JournalInternational Journal of Modern Physics D
Issue number8
Publication statusPublished - Aug 2009
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Mathematical Physics
  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this