Status of Dark Flow Phenomenon: Kashlinsky's Claim

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SUMMARY

The discussion centers on the status of the dark flow phenomenon, initially claimed by Kashlinsky, which refers to the net motion of galaxy clusters relative to the Cosmic Microwave Background (CMB). Recent analyses indicate that the phenomenon lacks robust statistical significance, with findings suggesting it does not even reach a one-sigma detection level. However, a more recent study published in the Astrophysical Journal presents new measurements that support the existence of bulk flow, indicating ongoing debate among cosmologists regarding the validity of Kashlinsky's claim.

PREREQUISITES
  • Understanding of Cosmic Microwave Background (CMB) anisotropies
  • Familiarity with statistical significance in astrophysical measurements
  • Knowledge of galaxy cluster dynamics
  • Awareness of recent astrophysical research methodologies
NEXT STEPS
  • Review the paper "http://arxiv.org/abs/0910.4233" for insights on dark flow detection methods
  • Examine the findings in the Astrophysical Journal article "http://iopscience.iop.org/2041-8205/712/1/L81/" for new measurements supporting bulk flow
  • Study the implications of CMB anisotropies on cosmological models
  • Investigate the statistical methods used in astrophysical research to assess detection significance
USEFUL FOR

Astronomers, cosmologists, and astrophysics researchers interested in the dynamics of galaxy clusters and the implications of the dark flow phenomenon on cosmological theories.

HossamCFD
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I was wondering about the status of the dark flow phenomena (net motion of galaxy clusters with respect to the CMB) claimed by Kashlinsky. Is it accepted among cosmologists or are there some skeptics about it ?
 
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Probably isn't anything. This more recent analysis shows it isn't even a one-sigma detection of an effect:
http://arxiv.org/abs/0910.4233

The basic problem is that they apparently didn't take into account the anisotropies of the CMB.
 
I thought so too, but then I found an even more recent http://iopscience.iop.org/2041-8205/712/1/L81/" in Astrophysical J. presenting new measurements in favor of the bulk flow.
 
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