Pith Number

pith:6MG3PL6I

pith:2026:6MG3PL6ILQQ6XUXGVAJ4GB5F4Z

not attested not anchored not stored refs resolved

Witnessing the rapid growth of disk galaxies over cosmic time using JWST and HST

Andr\'es Asensio Ramos, Carlos Marrero-de la Rosa, Fernando Buitrago, Ignacio Trujillo, Mireia Montes, Samane Raji

Disk galaxies at redshift 1 grew inside-out, adding little mass inside 8 kpc but tripling the outer regions.

arxiv:2605.15327 v1 · 2026-05-14 · astro-ph.GA

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6MG3PL6ILQQ6XUXGVAJ4GB5F4Z}

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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

✓ Portable graph bundle live · download bundle · merged state

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

Comparison with z=0 disk galaxies suggests that galaxies at z=1 grow inside-out, with little or no increase in mass within the inner 8 kpc, but a significant increase (approximately 300%) in the outer regions.

C2weakest assumption

The assumption that the galaxy 'edge' can be consistently identified across different redshifts and that the derived age profiles accurately reflect the star formation history without significant contamination from dust or other effects. (Abstract, paragraph on profiles)

C3one line summary

At z=1, disk galaxies exhibit U-shaped stellar age profiles with turnover at the edge, indicating inside-out growth with approximately 300% mass increase in outer regions since z=0.

References

222 extracted · 222 resolved · 57 Pith anchors

[1] & Ichikawa , T 2015

[2] Anders , F., Chiappini , C., Santiago , B. X., et al. 2014, , 564, A115 2014

[3] Arjona-G \'a lvez , E., Cardona-Barrero , S., Grand , R. J. J., et al. 2025, , 699, A301 2025

[4] Aumer , M., White , S. D. M., & Naab , T. 2014, , 441, 3679 2014

[5] 2018, , 854, 152 2018

Formal links

1 machine-checked theorem link

Receipt and verification

First computed	2026-05-20T00:00:52.831513Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f30db7afc85c21ebd2e6a813c307a5e6492cc4e7f44fa4fef9fd1e08759036fe

Aliases

arxiv: 2605.15327 · arxiv_version: 2605.15327v1 · doi: 10.48550/arxiv.2605.15327 · pith_short_12: 6MG3PL6ILQQ6 · pith_short_16: 6MG3PL6ILQQ6XUXG · pith_short_8: 6MG3PL6I

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/6MG3PL6ILQQ6XUXGVAJ4GB5F4Z \
  | 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: f30db7afc85c21ebd2e6a813c307a5e6492cc4e7f44fa4fef9fd1e08759036fe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7432a6037a3b43f6280e459accd5e9371420a91c1f760ca79b795fe928085c9b",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-05-14T18:39:53Z",
    "title_canon_sha256": "6cc7a4b75f8625553095a42e0c46e574b2e279be74b94e6c68ff742a7aae78e0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.15327",
    "kind": "arxiv",
    "version": 1
  }
}