Pith Number

pith:3LDZVPUW

pith:2026:3LDZVPUWDII4XIPTLUPDWQTS6Y

not attested not anchored not stored refs resolved

KiDS+VIKING-450 cosmology with Bayesian hierarchical model redshift distributions

Alan F. Heavens, Andrew H. Jaffe, Arrykrishna Mootoovaloo, Florent Leclercq, George T. Kyriacou, Konrad Kuijken

Bayesian hierarchical modeling of photometric redshifts in KiDS+VIKING-450 raises the inferred S8 value and reduces tension with Planck to 1.9 sigma.

arxiv:2605.15078 v1 · 2026-05-14 · astro-ph.CO

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Claims

C1strongest claim

We marginalise over the inferred redshift distributions and find that the Bayesian method increases the clustering parameter compared with previous studies, alleviating the S8 tension with Planck, where S8 ≡ σ8 √(Ωm / 0.3) = 0.756 ± 0.039, assuming flat ΛCDM.

C2weakest assumption

That subsets of 10^5 galaxies drawn from the full catalog are statistically representative of the full sample for determining the redshift distribution; the paper states this sensitivity is subdominant but does not quantify the selection criteria or show the full-sample limit.

C3one line summary

Bayesian hierarchical modeling of photometric redshifts in KiDS+VIKING-450 raises S8 to 0.756 ± 0.039 and reduces Planck tension to 1.9σ.

References

185 extracted · 185 resolved · 104 Pith anchors

[1] KiDS-Legacy: Cosmological constraints from cosmic shear with the complete Kilo-Degree Survey · doi:10.48550/arxiv.2503.19441

[2] pop-cosmos: Star formation over 12 Gyr from generative modelling of a deep infrared-selected galaxy catalogue · doi:10.48550/arxiv.2509.20430

[3] Euclid and KiDS-1000: Quantifying the impact of source-lens clustering on cosmic shear analyses. , keywords =. doi:10.1051/0004-6361/202451494 , archivePrefix =. 2407.09810 , primaryClass = · doi:10.1051/0004-6361/202451494

[4] arXiv e-prints , keywords = · doi:10.48550/arxiv.2506.12122

[5] pop-cosmos: Scaleable Inference of Galaxy Properties and Redshifts with a Data-driven Population Model. , keywords =. doi:10.3847/1538-4357/ad7736 , archivePrefix =. 2406.19437 , primaryClass = · doi:10.3847/1538-4357/ad7736

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Receipt and verification

First computed	2026-05-17T21:40:25.999220Z
Last reissued	2026-05-17T21:57:19.305134Z
Builder	pith-number-builder-2026-05-17-v1
Signature	unsigned_v0
Schema	pith-number/v1.0

Canonical hash

dac79abe961a11cba1f35d1e3b4272f625cba499a659d317c3bf2b644fc6c6b1

Aliases

arxiv: 2605.15078 · arxiv_version: 2605.15078v1

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/3LDZVPUWDII4XIPTLUPDWQTS6Y \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: dac79abe961a11cba1f35d1e3b4272f625cba499a659d317c3bf2b644fc6c6b1

Canonical record JSON

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    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2026-05-14T17:02:28Z",
    "title_canon_sha256": "331563748b40bd59e9694903c68d245602ad68c9da7a4b67f93056e00cee7d50"
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