Time Evolution of the CMB Quadrupole
Year: 2022
Type: article
Abstract: I show that the quadrupole of the Cosmic Microwave Background (CMB) evolves more rapidly than previously expected, as a result of the acceleration of the Sun toward the Galactic center. The acceleration, measured most recently by Gaia EDR3, implies a fractional change in the quadrupole of ∼10−9 per year, an order of magnitude larger than expected from the evolution in the last scattering surface of the CMB.
Source: Research Notes of the AAS
Author: Abraham Loeb
Institution: Harvard University
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4221109075