Reconciling cosmic dipolar tensions with a gigaparsec void
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.
Authors
- Tingqi Cai
- Qianhang Ding (ORCID: https://orcid.org/0000-0001-6703-2531)
- Yi Wang (ORCID: https://orcid.org/0000-0002-7605-553X)
Institutions
- Hong Kong University of Science and Technology (HK)
- Institute for Basic Science (KR)
Publication Details
- Journal
- Physical review. D/Physical review. D.
- Published
- 2025-05-02
- DOI
- https://doi.org/10.1103/physrevd.111.103502
- Citations
- 2
- Primary Topic
- Cosmology and Gravitation Theories
- Type
- article
- Field-Weighted Citation Impact
- 2.31
Funders
- Glaucoma Research Foundation
- Research Grants Council, University Grants Committee
- National Key Research and Development Program of China