Pith Number

pith:2RLSVC2K

pith:2026:2RLSVC2KRRFBOZDTEQCJCPXKAV

not attested not anchored not stored refs resolved

Reconstructing the Stripping History of the Sagittarius Stream with Neural Networks

Cuihua Du, Haoyang Liu, Jian Zhang, Mingji Deng, Zhongcheng Li

A neural network trained on simulations infers when Sagittarius Stream stars were stripped from their dwarf galaxy, revealing a clear metallicity gradient with time.

arxiv:2605.14308 v1 · 2026-05-14 · astro-ph.GA

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\usepackage{pith}
\pithnumber{2RLSVC2KRRFBOZDTEQCJCPXKAV}

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Record completeness

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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

Applying our method to these stars, we measure a clear metallicity gradient with stripping time, well described by a linear relation with slope ∼0.3 dex Gyr^{-1}. We further predict the stripping times of globular clusters previously suggested to originate from the Sgr dSph.

C2weakest assumption

The neural network trained on N-body simulations accurately generalizes to real observational data without significant biases arising from simulation assumptions, data selection, or observational uncertainties.

C3one line summary

A neural network trained on simulations infers stripping times for Sagittarius stream stars from phase-space data, measuring a 0.3 dex/Gyr metallicity gradient and estimating ages for globular clusters such as Pal 12 and NGC 2419.

References

111 extracted · 111 resolved · 60 Pith anchors

[1] The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package · doi:10.3847/1538-4357/ac7c74

[2] The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package · doi:10.3847/1538-3881/aabc4f

[3] arXiv , Author =:1307.6212 , Journal = 2013 · doi:10.1051/0004-6361/201322068

[4] 9Ã uVBʧX˛=ұ K Td GjZoUU Ԫ[E>-uhc 7ch HεVS :SQ0<( ? 6v · doi:10.1093/mnras/183.3.341

[5] Simulating the joint evolution of quasars, galaxies and their large-scale distribution · doi:10.1038/nature03597

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-17T23:39:10.027817Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4572a8b4a8c4a1764732404913eea056d7d3c9e591ae53e30e3943ab1643164

Aliases

arxiv: 2605.14308 · arxiv_version: 2605.14308v1 · doi: 10.48550/arxiv.2605.14308 · pith_short_12: 2RLSVC2KRRFB · pith_short_16: 2RLSVC2KRRFBOZDT · pith_short_8: 2RLSVC2K

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/2RLSVC2KRRFBOZDTEQCJCPXKAV \
  | 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: d4572a8b4a8c4a1764732404913eea056d7d3c9e591ae53e30e3943ab1643164

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4d8fd0075cdb7bf51f9efb2d140a3f75c496c8db04df10ebf87d57201e162bfe",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-05-14T03:21:24Z",
    "title_canon_sha256": "883f45a8e69496d751baa2d4024169e51a05ed5ec6b5f03c7299c488d68d3d38"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.14308",
    "kind": "arxiv",
    "version": 1
  }
}