Journal article
Symmetry in Hyper Suprime-Cam Galaxy Spin Directions
- Abstract:
- We perform a Bayesian analysis of anisotropy in binary galaxy spin directions in the Hyper-Suprime Cam Data Release 3 catalog, in response to a recent claim that it exhibits a dipole. We find no significant evidence for anisotropy, or for a direction-independent spin probability that differs from 0.5. These results are unchanged allowing for a quadrupole or simply searching for a fixed anisotropy between any two hemispheres, and the Bayes factor indicates decisive evidence for the isotropic model. Our principled method contrasts with the statistic employed by Shamir, which lacks a strong theoretical foundation. Our code is available at ✎.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of Record, Version of record, pdf, 1.8MB, Terms of use)
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- Publisher copy:
- 10.3847/2515-5172/ad8fb1
Authors
- Publisher:
- American Astronomical Society
- Journal:
- Research Notes of the American Astronomical Society More from this journal
- Volume:
- 8
- Issue:
- 11
- Article number:
- 281
- Publication date:
- 2024-11-11
- Acceptance date:
- 2024-11-06
- DOI:
- EISSN:
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2515-5172
- Language:
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English
- Keywords:
- Source identifiers:
-
2411929
- Deposit date:
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2024-11-11
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