Pith Number

pith:LKV5HX2P

pith:2026:LKV5HX2PN7BGBEFKYNASO75E3B

not attested not anchored not stored refs pending

Radial Distributions of Star Formation and Gas-phase Metallicity in Spiral-Elliptical Galaxy Pairs

Cailu Shi, Guozhen Hu, Linlin Li, Shiyin Shen, Shuai Feng, Wenyuan Cui

Spirals paired with ellipticals show suppressed central star formation and higher central metallicities.

arxiv:2604.14092 v2 · 2026-04-15 · astro-ph.GA

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LKV5HX2PN7BGBEFKYNASO75E3B}

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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

Spirals in S+E pairs show suppressed central star formation and elevated metallicities, whereas spirals in spiral-spiral pairs exhibit centrally enhanced star formation and reduced metallicities; the degree depends on companion mass and gas velocity field symmetry, leading to the inference that hot CGM suppresses accretion and tidal encounters trigger enrichment.

C2weakest assumption

That the observed differences in SFR and metallicity radial profiles are caused by the presence of the elliptical companion's hot circumgalactic medium and by tidal perturbations rather than by selection biases, mass differences, or other unaccounted environmental factors.

C3one line summary

Spirals paired with ellipticals show centrally suppressed star formation and higher gas-phase metallicities than spirals paired with other spirals, with the effect scaling with companion mass and gas kinematics.

Receipt and verification

First computed	2026-06-19T16:09:58.178239Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5aabd3df4f6fc26090aac341277fa4d84519c0c0bdd774692e3083aaf6e23086

Aliases

arxiv: 2604.14092 · arxiv_version: 2604.14092v2 · doi: 10.48550/arxiv.2604.14092 · pith_short_12: LKV5HX2PN7BG · pith_short_16: LKV5HX2PN7BGBEFK · pith_short_8: LKV5HX2P

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/LKV5HX2PN7BGBEFKYNASO75E3B \
  | 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: 5aabd3df4f6fc26090aac341277fa4d84519c0c0bdd774692e3083aaf6e23086

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "53f00c496b8b0079caa24530d08f816c1ac475dd27465036f1ce45214db628b6",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-04-15T17:07:30Z",
    "title_canon_sha256": "179f23721054b0f8eafd6673fba2af0c7469fbe9ae2f19455f7bbbaa3a152519"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.14092",
    "kind": "arxiv",
    "version": 2
  }
}