Large-scale cosmic flows and moving dark energy

Details Large-scale cosmic flows and moving dark energy Large-scale cosmic flows and moving dark energy

2008-11-21

arxiv.org/abs/0811.3606v3

Astronomy and Astrophysics

Astrophysics

11 pages, 2 figures. New comments and references included. Final version to appear in JCAP

Scientific paper

10.1088/1475-7516/2009/03/015

Large-scale matter bulk flows with respect to the cosmic microwave background have very recently been detected on scales 100 Mpc/h and 300 Mpc/h by using two different techniques showing an excellent agreement in the motion direction. However, the unexpectedly large measured amplitudes are difficult to understand within the context of standard LCDM cosmology. In this work we show that the existence of such a flow could be signaling the presence of moving dark energy at the time when photons decoupled from matter. We also comment on the relation between the direction of the CMB dipole and the preferred axis observed in the quadrupole in this scenario.

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