Cosmology with clusters of galaxies

Research output: Contribution to journalArticle

Abstract

Rich clusters of galaxies, the largest virialized systems known, place some of the most powerful constraints on cosmology. I discuss below the use of clusters of galaxies in determining two fundamental properties of the universe: the mass-density of the universe, and the distribution of dark matter. I show that several independent methods utilizing clusters of galaxies - cluster dynamics and the mass-to-light function, baryon fraction in clusters, and cluster abundance and its evolution - all indicate the same result: a universe with a low mass-density, ∼20% of the critical density needed to halt the universal expansion, and a mass distribution that approximately traces light on large scales.

Original languageEnglish (US)
Pages (from-to)16-20
Number of pages5
JournalNuclear Physics B - Proceedings Supplements
Volume138
Issue number1-3
DOIs
StatePublished - Jan 1 2005

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics

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