Pith Number

pith:RWQUVMCM

pith:2026:RWQUVMCMNBZQ3NKM2OS5PDFPFF

not attested not anchored not stored refs resolved

Revisiting the Galactic age-metallicity relation from wide white dwarf-main-sequence binaries

Alberto Rebassa-Mansergas, Iset Tejero-G\'omez, Roberto Raddi

The age-metallicity relation in the Galactic disk shows large intrinsic scatter at all ages.

arxiv:2604.15939 v1 · 2026-04-17 · astro-ph.SR · astro-ph.GA

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\usepackage{pith}
\pithnumber{RWQUVMCMNBZQ3NKM2OS5PDFPFF}

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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

We derive the AMR from several sub-samples of WD+MS that use independent measurements of [Fe/H] abundances and consistently find a large dispersion in [Fe/H] at all ages. This behaviour agrees with previous determinations of the AMR based on both WD+MS binaries and samples of isolated stars.

C2weakest assumption

That the white dwarf and main-sequence components in wide binaries are coeval so that white dwarf cooling ages accurately represent the system age, and that the compiled [Fe/H] values from the main-sequence companions faithfully reflect the birth metallicity of the system.

C3one line summary

Wide WD+MS binaries from Gaia show large intrinsic scatter in [Fe/H] at all ages for the Galactic disk AMR, agreeing with prior studies and indicating complex chemical evolution.

References

56 extracted · 56 resolved · 0 Pith anchors

[1] Althaus, L. G., Camisassa, M. E., Miller Bertolami, M. M., Córsico, A. H., & García-Berro, E. 2015, A&A, 576, A9 2015

[2] 2023, A&A, 678, A158 2023

[3] Barrientos, M. & Chanamé, J. 2021, ApJ, 923, 181 2021

[4] Camisassa, M. E., Althaus, L. G., Córsico, A. H., et al. 2019, A&A, 625, A87 2019

[5] Camisassa, M. E., Althaus, L. G., Córsico, A. H., et al. 2016, ApJ, 823, 158 2016

Receipt and verification

First computed	2026-05-27T14:06:44.684023Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8da14ab04c68730db54cd3a5d78caf294d9b64565cbda76cf0e28ef37a576f5b

Aliases

arxiv: 2604.15939 · arxiv_version: 2604.15939v1 · doi: 10.48550/arxiv.2604.15939 · pith_short_12: RWQUVMCMNBZQ · pith_short_16: RWQUVMCMNBZQ3NKM · pith_short_8: RWQUVMCM

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/RWQUVMCMNBZQ3NKM2OS5PDFPFF \
  | 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: 8da14ab04c68730db54cd3a5d78caf294d9b64565cbda76cf0e28ef37a576f5b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "33cc8d4e7fdb2d0803e2fab45ad6fec7bf00d3214b3c87978a0a8312979225ac",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2026-04-17T10:57:37Z",
    "title_canon_sha256": "056e3b7db86940d92f3a9e47138ce353f5a0f5740ef3bceddfa844d84aa86c19"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.15939",
    "kind": "arxiv",
    "version": 1
  }
}