English

Cosmic Velocities 2000: A Review

Astrophysics 2007-05-23 v1

Abstract

I review the status of cosmic velocity analysis as of January 2000, with an emphasis on two key questions: (1) What is the scale of the largest bulk flows in the universe? and (2) What is the value of beta=Omega_m^{0.6}/b indicated by cosmic velocities, and what does this tell us about Omega_m itself? These are the most important issues for cosmic flow analysis, and each has been controversial in recent years. I argue that a preponderance of the evidence at present argues against very large scale (> 100 Mpc) bulk flows, and favors beta = 0.4-0.5, corresponding to a low-density (Omega_m=0.2-0.3) universe.

Keywords

Cite

@article{arxiv.astro-ph/0003232,
  title  = {Cosmic Velocities 2000: A Review},
  author = {Jeffrey A. Willick},
  journal= {arXiv preprint arXiv:astro-ph/0003232},
  year   = {2007}
}

Comments

9 pages, uses moriond.sty (included), to appear in Proceedings of the XXXVth Rencontres de Moriond: Energy Densities in the Universe

R2 v1 2026-07-22T07:45:18.004Z