pith:ZE3OYOBY
pop-cosmos: Star formation over 12 Gyr from generative modelling of a deep infrared-selected galaxy catalogue
A generative model trained on 420,000 infrared-selected galaxies shows the cosmic star formation rate density peaked at redshift 1.3 and maps distinct star-formation histories for star-forming versus quiescent systems.
arxiv:2509.20430 v2 · 2025-09-24 · astro-ph.GA · astro-ph.CO
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\pithnumber{ZE3OYOBYFQKAXTMNLTSZS3GUXE}
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Claims
The star formation rate density peaks at z=1.3±0.1 with value 0.08±0.01 M⊙ yr⁻¹ Mpc⁻³; non-parametric star formation histories show SF galaxies with gradually decorrelating SFRs and Q galaxies with sharp quenching transitions on ~1 Gyr timescales; AGN infrared luminosity peaks as massive galaxies approach the SF-to-Q transition.
The score-based diffusion model trained on the IRAC-selected COSMOS2020 sample accurately recovers the joint posterior distributions over the 16 SPS parameters without substantial selection biases or model misspecification that would distort the integrated SFRD or the derived SFH correlations.
A score-based diffusion generative model on deep infrared galaxy photometry yields a star formation rate density peaking at z=1.3 and shows distinct non-parametric star formation histories plus AGN activity peaking during the quenching transition of massive galaxies.
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| First computed | 2026-05-20T14:03:21.433923Z |
|---|---|
| Builder | pith-number-builder-2026-05-17-v1 |
| Signature | Pith Ed25519
(pith-v1-2026-05) · public key |
| Schema | pith-number/v1.0 |
Canonical hash
c936ec38382c140bcd8d5ce5996cd4b90d76f1a6a6b382d92bf594250f1db06c
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· · · · ·Agent API
Verify this Pith Number yourself
curl -sH 'Accept: application/ld+json' https://pith.science/pith/ZE3OYOBYFQKAXTMNLTSZS3GUXE \
| 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: c936ec38382c140bcd8d5ce5996cd4b90d76f1a6a6b382d92bf594250f1db06c
Canonical record JSON
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"license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
"primary_cat": "astro-ph.GA",
"submitted_at": "2025-09-24T18:00:13Z",
"title_canon_sha256": "4bb0d589d76331e1d32e5d9d244ad9c02045ed386bb3932ed8c9576017d9fa00"
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