Work

Reconciling cosmic dipolar tensions with a gigaparsec void

Year: 2025

Type: article

Abstract: Recent observations indicate a $4.9\ensuremath{\sigma}$ tension between the cosmic microwave background (CMB) and quasar dipoles. This tension challenges the cosmological principle. We propose that if we live in a gigaparsec-scale void, the CMB and quasar dipolar tension can be reconciled. This is because we are unlikely to live at the center of the void, and a within 10% offset from the center will impact the quasars and CMB differently in their dipolar anisotropies. As we consider a large and thick void, our setup can also ease the Hubble tension.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.111.103502

Authors: Tingqi Cai, Qianhang Ding, Yi Wang

Institutions: Hong Kong University of Science and Technology, Institute for Basic Science

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Glaucoma Research Foundation, Research Grants Council, University Grants Committee, National Key Research and Development Program of China

Awards: G3777094444, G5578809208