Corpus ID: 117799091

Accelerated expansion and the virial theorem

  title={Accelerated expansion and the virial theorem},
  author={Steen H. Hansen},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
  • S. Hansen
  • Published 31 March 2012
  • Physics
  • arXiv: Cosmology and Nongalactic Astrophysics
When dark matter structures form and equilibrate they have to release a significant amount of energy in order to obey the virial theorem. Since dark matter is believed to be unable to radiate, this implies that some of the accreted dark matter particles must be ejected with high velocities. These ejected particles may then later hit other cosmological structures and deposit their momentum within these structures. This induces a pressure between the cosmological structures which opposes the… Expand