PIRSA:10040098 Conference Cosmology

DOI10.48660/10040098

Conference/School: Fundamental Physics and Large Scale Structure (2010)

Komatsu, E. (2010). Bullet Cluster: A Challenge to Lambda-CDM Cosmology. Perimeter Institute. https://pirsa.org/10040098

Komatsu, Eiichiro. Bullet Cluster: A Challenge to Lambda-CDM Cosmology. Perimeter Institute, Apr. 29, 2010, https://pirsa.org/10040098 

@misc{ pirsa_PIRSA:10040098,
  doi = {10.48660/10040098},
  url = {https://pirsa.org/10040098},
  author = {Komatsu, Eiichiro},
  keywords = {Cosmology},
  language = {en},
  title = {Bullet Cluster: A Challenge to Lambda-CDM Cosmology},
  publisher = {Perimeter Institute},
  year = {2010},
  month = {apr},
  note = {PIRSA:10040098 see, \url{https://pirsa.org}}
}

Abstract

We show that the existence of the bullet cluster, 1E0657-56, is incompatible with the prediction of the standard Lambda CDM cosmology. The probability of finding the large infall velocity (3000 km/s) necessary for explaining the X-ray and weak lensing data of 1E0657-56 is between 3.3x10^{-11} and 3.6x10^{-9}. The existence of the bullet cluster poses a serious challenge to LCDM cosmology, unless a lower infall velocity solution for 1E0657-56 with <1800 km/s is found.

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