Linear gas dynamics in the expanding universe

Nickolay Y. Gnedin, Emily J. Baker, Thomas J. Bethell, Meredith M. Drosback, A. Gayler Harford, Amalia K. Hicks, Adam G. Jensen, Brian A. Keeney, Christopher M. Kelso, Mark C. Neyrinck, Scott E. Pollack, Timothy P. Van Vliet

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


We investigate the relationship between the dark matter and baryons in the linear regime. This relation is quantified by the so-called "filtering scale." We show that a simple Gaussian Ansatz that uses the filtering scale provides a good approximation to the exact solution.

Original languageEnglish (US)
Pages (from-to)525-528
Number of pages4
JournalAstrophysical Journal
Issue number2 I
StatePublished - Feb 1 2003
Externally publishedYes


  • Cosmic microwave background
  • Cosmology: theory
  • Galaxies: formation
  • Intergalactic medium
  • Large-scale structure of universe

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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