Textures and clusters

James G. Bartlett, Andrew K. Gooding, David N. Spergel

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

We discuss the properties of galaxy clusters expected in a texture-seeded, CDM-dominated, Ω = 1 universe. Assuming that the textures are spherical, we use the spherical collapse model to compute the cluster velocity dispersion (or temperature) distribution function. For objects of mass 1011 to 1015 M, we find v ∝ Mγ with γ ≃ 0.25. An unbiased (b = 1) texture model predicts too many high-velocity dispersion clusters. A biased texture model (b ∼ 3-4) appears to be compatible with cluster properties inferred from optical and X-ray observations. In the texture model, the cluster velocity distribution function does not evolve rapidly; thus, the model predicts the existence of rich clusters at moderate redshift (z ≈ 1-2).

Original languageEnglish (US)
Pages (from-to)1-6
Number of pages6
JournalAstrophysical Journal
Volume403
Issue number1
DOIs
StatePublished - Jan 1 1993

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Cosmology: theory
  • Dark matter
  • Galaxies: clustering
  • Large-scale structure of universe

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    Bartlett, J. G., Gooding, A. K., & Spergel, D. N. (1993). Textures and clusters. Astrophysical Journal, 403(1), 1-6. https://doi.org/10.1086/172175