Self-similar secondary infall and accretion in an Einstein-de Sitter universe

  title={Self-similar secondary infall and accretion in an Einstein-de Sitter universe},
  author={Edmund Bertschinger},
  journal={Astrophysical Journal Supplement Series},
  • E. Bertschinger
  • Published 1 May 1985
  • Physics
  • Astrophysical Journal Supplement Series
Similarity solutions have been found for secondary infall and accretion onto an initially overdense perturbation in an Einstein--de Sitter (..cap omega.. = 1) universe. After the initial collapse of a positive density perturbation, bound shells continue to turn around and fall in, with the radius of the shell currently turning around increasing as t/sup 8/9/ and the mass within this radius increasing as t/sup 2/3/. The secondary infall approaches a self-similar form, with the exact behavior… 
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