Moving dark energy and the CMB dipole

Abstract

We explore the possibility that the rest frames of CMB, matter and dark energy differ one from another, i.e. they do not converge on very large scales. In such a case, the usual interpretation of the CMB dipole as being due to the relative motion of the observer with respect to the CMB rest frame is not appropriate. Instead, we find that the measured dipole is due to the observer motion relative to the cosmic center of mass rest frame. This means, in particular, that even an observer at rest with respect to the CMB radiation could measure a non-vanishing dipole anisotropy, provided dark energy is moving with respect to the CMB. We also consider the consequences of moving dark energy for the determination of cosmic bulk flows.

9 pages, no figures. New comments and references included. Final version to appear in JCAP

References in corpus (5)

• Cosmology and the Fate of Dilatation Symmetry
• A Low CMB Quadrupole from Dark Energy Isocurvature Perturbations
• Theoretical tools for CMB physics
• Moving dark energy and the CMB dipole
• Scaling Dark Energy

Cited by in corpus (20)

• Cosmological evolution in vector-tensor theories of gravity
• Cosmology with moving dark energy and the CMB quadrupole
• Adventures in Friedmann Cosmology: An Educationally Detailed Expansion of the Cosmological Friedmann Equations
• On structure formation from a small-scales-interacting dark sector
• Anisotropic expansion and SNIa: an open issue
• Velocity-dependent interacting dark energy and dark matter with a Lagrangian description of perfect fluids
• The Evolution of Our Local Cosmic Domain: Effective Causal Limits
• Moving dark energy and the CMB dipole
• Non-trivial gravitational waves and structure formation phenomenology from dark energy
• Cosmological anisotropy from non-comoving dark matter and dark energy
• A class of ghost-free theories in symmetric teleparallel geometry
• Non-comoving Cosmology
• Large-scale cosmic flows and moving dark energy
• Warm inflation with non-comoving scalar field and radiation fluid
• Confronting quintessence models with recent high-redshift supernovae data
• Cosmology with moving bimetric fluids
• Backreaction mechanism in multifluid and extended cosmologies
• Measuring our peculiar velocity from spectroscopic redshift surveys
• Testing for gravitational preferred directions with galaxy and lensing surveys
• Horndeski in motion