Pith Number

pith:7CE6SBY5

pith:2026:7CE6SBY53OJ3K6TB42WIHUNMC2

not attested not anchored not stored refs resolved

Magnetised CGM Gas at z~1 revealed by SPICE-RACS

A. J. M. Thomson, A. Khadir, Amit Seta, B. M. Gaensler, C. S. Anderson, C. Van Eck, D. Alonso-L\'opez, E. Carretti, G. Heald, L. Rudnick, M. Br\"uggen, O. Hlinka, R. Omae, S. A. Mao, S. P. O'Sullivan, Sunil Malik, S. W. Duchesne, Takuya Akahori, T. J. Galvin, Y. K. Ma

Quasar sightlines through Mg II absorbers at z~1 show excess Faraday rotation dispersion indicating magnetized circumgalactic gas.

arxiv:2605.16924 v1 · 2026-05-16 · astro-ph.GA · astro-ph.CO

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\usepackage{pith}
\pithnumber{7CE6SBY53OJ3K6TB42WIHUNMC2}

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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

In this foreground-cleaned sample, Mg II sightlines exhibit a 4.5σ excess in the residual RM dispersion of 4.13 ± 0.91 rad m^{-2} relative to the control sample, at a median absorber redshift of z∼1.14. This implies model-dependent CGM magnetic field strengths of ∼0.4 - 0.8 μG over projected radii of 20 - 150 kpc.

C2weakest assumption

The observed excess in residual RM dispersion after Galactic subtraction and cuts on Milky Way HI column density and Hα intensity is produced by magnetized gas in the circumgalactic medium of the foreground galaxies traced by Mg II absorbers, rather than by residual contamination, selection effects, or unaccounted astrophysical contributions.

C3one line summary

A 4.5σ excess RM dispersion of 4.13 ± 0.91 rad m^{-2} is found in 191 Mg II sightlines versus controls, implying model-dependent CGM magnetic fields of 0.4-0.8 μG at projected radii 20-150 kpc and z~1.14.

References

170 extracted · 170 resolved · 26 Pith anchors

[1] S., McClure-Griffiths , N 2024

[2] A., Fletcher , A., et al 2018

[3] L., Miniati, F., & Lilly, S 2010

[4] L., Miniati, F., & Lilly, S 2013

[5] L., Miniati, F., Lilly, S 2008

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-20T00:03:30.937233Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f889e9071ddb93b57a61e6ac83d1ac16b076149652ba99972c4fbb58b132abb2

Aliases

arxiv: 2605.16924 · arxiv_version: 2605.16924v1 · doi: 10.48550/arxiv.2605.16924 · pith_short_12: 7CE6SBY53OJ3 · pith_short_16: 7CE6SBY53OJ3K6TB · pith_short_8: 7CE6SBY5

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/7CE6SBY53OJ3K6TB42WIHUNMC2 \
  | 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: f889e9071ddb93b57a61e6ac83d1ac16b076149652ba99972c4fbb58b132abb2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bbe6ebfb14d3b73eadebb905cc0fc39a0c70a2c5adea9b5dc172b422024cce0d",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-05-16T10:30:39Z",
    "title_canon_sha256": "5fb5b253e05604c73baa0f5db4aa3b23b217ca479ff6c5a9a8f35175a6e97887"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.16924",
    "kind": "arxiv",
    "version": 1
  }
}