The Cosmological Dipole in Tilted Anisotropic Universes
arXiv:2512.03867 · doi:10.1103/82sh-h3cv
Abstract
There is tentative evidence for a mismatch between the rest frames of matter and the cosmic microwave background, the "quasar dipole anomaly". We consider such a dipole in tilted anisotropic models, for a range of scenarios and sources: spatial curvature, cosmic heat flux, large scale electromagnetic fields and a Khronon field. Crucially, we determine the ancillary effects on other cosmological observables in each of these models and we show that, apart from the case of the Khronon field, it is unlikely that one can obtain a dipole with the amplitude that is being observed unless one considers additional exotica.
11 pages, submitted to Phys. Rev. D
References in corpus (34)
- Planck 2018 results. X. Constraints on inflation
- The Cosmic Microwave Background Spectrum from the Full COBE/FIRAS Data Set
- Ghost Condensation and a Consistent Infrared Modification of Gravity
- Purely kinetic k-essence as unified dark matter
- DESI DR2 Results II: Measurements of Baryon Acoustic Oscillations and Cosmological Constraints
- Dark Matter and Dark Radiation
- Constraints on a Primordial Magnetic Field
- A Test of the Cosmological Principle with Quasars
- How isotropic is the Universe?
- Detection of the velocity dipole in the radio galaxies of the NRAO VLA Sky Survey
- A Challenge to the Standard Cosmological Model
- How Anisotropic is our Universe?
- Relativistic fluid dynamics: physics for many different scales
- Thermal Dynamics in General Relativity
- The initial conditions of the universe: how much isocurvature is allowed?
- Testing the Cosmological Principle with CatWISE Quasars: A Bayesian Analysis of the Number-Count Dipole
- Constraints on the Electrical Charge Asymmetry of the Universe
- Variational multi-fluid dynamics and causal heat conductivity
- An extensive investigation of the Generalised Dark Matter model
- Dipole Anisotropy from an Entropy Gradient
- Dipole Cosmology: The Copernican Paradigm Beyond FLRW
- Measuring the geometry of the Universe in the presence of isocurvature modes
- The expected kinematic matter dipole is robust against source evolution
- Relativistic Khronon Theory in agreement with Modified Newtonian Dynamics and Large-Scale Cosmology
- Colloquium: The Cosmic Dipole Anomaly
- Reassessment of the dipole in the distribution of quasars on the sky
- The kinematic contribution to the cosmic number count dipole
- Cosmic dipole tensions: confronting the cosmic microwave background with infrared and radio populations of cosmological sources
- Ghost Dark Matter
- Overdispersed radio source counts and excess radio dipole detection
- Spatially Homogeneous Universes with Late-Time Anisotropy
- Clustering properties of the CatWISE2020 quasar catalogue and their impact on the cosmic dipole anomaly
- Matter Dipole and Hubble Tension due to Large Wavelength Perturbations
- Cosmic Multipoles in Galaxy Surveys II: Comparing Different Methods in Assessing the Cosmic Dipole