Pith Number

pith:ZMCROMAE

pith:2025:ZMCROMAEYDATUN5AMPNPLD56O5

not attested not anchored not stored refs resolved

Age and metallicity of low-mass galaxies: from their centres to their stellar halos

Antonela Monachesi, Elisa A. Tau, Facundo A. G\'omez, Federico Marinacci, Freeke van de Voort, Rebekka Bieri, Robert J. J. Grand, R\"udiger Pakmor

The timing of a dominant satellite's infall explains the scatter in metallicity of stellar halos around low-mass galaxies.

arxiv:2511.20806 v2 · 2025-11-25 · astro-ph.GA

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\usepackage{pith}
\pithnumber{ZMCROMAEYDATUN5AMPNPLD56O5}

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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

✓ 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

We find that the dispersion in the mass-metallicity relation found in the stellar halos of low-mass galaxies can be explained with the infall time of their most dominant satellite: at a fixed accreted stellar halo mass, dwarf galaxies that accreted this satellite at later times have more metal-rich accreted stellar halos.

C2weakest assumption

The Auriga Project simulations accurately reproduce the formation histories, stellar populations, and definitions of in-situ versus accreted material in real low-mass galaxies.

C3one line summary

Simulations show negative metallicity gradients in all low-mass galaxies, U-shaped age profiles in most, and halo metallicity dispersion tied to the infall time of the dominant satellite.

References

82 extracted · 82 resolved · 0 Pith anchors

[1] 2001, AJ, 122, 2524 2001

[2] L., van Zee, L., Dale, D 2014

[3] 2011, MNRAS, 411, 1013 2011

[4] 2006, A&A, 459, 423 2006

[5] Belokurov, V ., Erkal, D., Evans, N. W., Koposov, S. E., & Deason, A. J. 2018, MNRAS, 478, 611 Benítez-Llambay, A., Navarro, J. F., Abadi, M. G., et al. 2016, MNRAS, 456, 1185 2018

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-17T23:39:17.040296Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cb05173004c0c13a37a063daf58fbe776847b5540ca03a67291d7075b1f149ad

Aliases

arxiv: 2511.20806 · arxiv_version: 2511.20806v2 · doi: 10.48550/arxiv.2511.20806 · pith_short_12: ZMCROMAEYDAT · pith_short_16: ZMCROMAEYDATUN5A · pith_short_8: ZMCROMAE

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/ZMCROMAEYDATUN5AMPNPLD56O5 \
  | 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: cb05173004c0c13a37a063daf58fbe776847b5540ca03a67291d7075b1f149ad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8c8b29e036ce0640bd11975a035d719adba5e44f63e0479ec30c75e8daae635e",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2025-11-25T19:47:37Z",
    "title_canon_sha256": "d3b8ec144f1bbb79f4106391fe005acc7f6c7e493667791ef48a5c8673263d86"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2511.20806",
    "kind": "arxiv",
    "version": 2
  }
}