Krishnan, C and Mohayaee, R and Colgáin, Eà and Sheikh-Jabbari, MM and Yin, L (2022) Hints of FLRW breakdown from supernovae. In: Physical Review D, 105 (6).
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Abstract
A 10 difference in the scale for the Hubble parameter constitutes a clear problem for cosmology. Here, considering angular distribution of type Ia supernovae (SN) within the Pantheon compilation and working within flat ?CDM cosmology, we observe a correlation between higher H0 and the CMB dipole direction, confirming our previous results for strongly lensed quasars Classical Quantum Gravity 38, 184001 (2021)CQGRDG0264-938110.1088/1361-6382/ac1a81. Concretely, we record a ~1 km/s/Mpc variation in H0 at antipodal points on the sky within the Pantheon sample, which is evident in the Low z subsample (z?0.075) and gets enhanced by higher redshift SN. Our work raises the possibility that we may be at the precision required to probe anisotropic Hubble expansions, while providing a concrete prediction for future inferences of H0. © 2022 American Physical Society.
| Item Type: | Journal Article |
|---|---|
| Publication: | Physical Review D |
| Publisher: | American Physical Society |
| Additional Information: | The copyright for this article belongs to the Authors. |
| Department/Centre: | Division of Physical & Mathematical Sciences > Centre for High Energy Physics |
| Date Deposited: | 21 Jun 2022 05:17 |
| Last Modified: | 21 Jun 2022 05:17 |
| URI: | https://eprints.iisc.ac.in/id/eprint/73752 |
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