Pith Number

pith:65YR2R6S

pith:2026:65YR2R6SY3GAGBOAV2O5L3MXT2

not attested not anchored not stored refs resolved

First Light And Reionization Epoch Simulations (FLARES) XXI: The UV Indices of Galaxies in the Early Universe

Aswin P. Vijayan, Connor Sant Fournier, Conor M. Byrne, Jack C. Turner, Joseph Caruana, Kristian Zarb Adami, Stephen M. Wilkins, William J. Roper

UV absorption indices, especially the 1719 Å feature, correlate strongly with stellar metallicity in early-universe galaxies.

arxiv:2605.13472 v1 · 2026-05-13 · astro-ph.GA

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\usepackage{pith}
\pithnumber{65YR2R6SY3GAGBOAV2O5L3MXT2}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

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The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

Certain indices, particularly the 1719 Å feature, exhibit strong and consistent correlations with stellar metallicity, while others display increased sensitivity to SFH. Across most indices, equivalent widths increase monotonically with metallicity.

C2weakest assumption

That the BPASS stellar population synthesis models combined with FLARES simulation outputs accurately represent the stellar populations, metallicity distributions, and star formation histories in real high-redshift galaxies.

C3one line summary

Simulations of high-redshift galaxies show the 1719 Å UV index reliably traces stellar metallicity while others are more sensitive to star formation history.

References

278 extracted · 278 resolved · 99 Pith anchors

[1] year = 1983, month = sep, volume = 1983

[3] Steidel and Mark Dickinson and Kurt L · doi:10.1086/306431

[4] Dust Absorption And The Ultraviolet Luminosity Density At z \approx 3 As Calibrated By Local Starburst Galaxies · doi:10.1086/307523

[5] Dust Grain Size Distributions and Extinction in the Milky Way, LMC, and SMC · doi:10.1086/318651

[7] The Initial Mass Function of Stars: Evidence for Uniformity in Variable Systems · doi:10.1126/science.1067524

Receipt and verification

First computed	2026-05-18T02:44:41.535297Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f7711d47d2c6cc0305c0ae9dd5ed979e9afcf91551d997a3b2f98cdad2e88760

Aliases

arxiv: 2605.13472 · arxiv_version: 2605.13472v1 · doi: 10.48550/arxiv.2605.13472 · pith_short_12: 65YR2R6SY3GA · pith_short_16: 65YR2R6SY3GAGBOA · pith_short_8: 65YR2R6S

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/65YR2R6SY3GAGBOAV2O5L3MXT2 \
  | 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: f7711d47d2c6cc0305c0ae9dd5ed979e9afcf91551d997a3b2f98cdad2e88760

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1abc794e1fcd43cbbf60e787b0e8fbca19939f2f1ffb947c6546546fa014749b",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-05-13T12:59:22Z",
    "title_canon_sha256": "7df2e29efa2c6aef7d9e2bc697eb073e3e81efeea87a5578afbcb64b59fcdf07"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.13472",
    "kind": "arxiv",
    "version": 1
  }
}