PIRSA:10040098

Bullet Cluster: A Challenge to Lambda-CDM Cosmology

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}}
          }

Eiichiro Komatsu Max-Planck-Institut für Astrophysik (MPA), Garching

Talk numberPIRSA:10040098
DOI10.48660/10040098
Collection
Talk Type Conference
Subject

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.