Pith Number

pith:IENDURP7

pith:2026:IENDURP7D2YZ5J4ZPSOXB5K4TI

not attested not anchored not stored refs resolved

SIMPLIFI -- Study of Interstellar Magnetic Polarization: a Legacy Investigation of Filaments. I. Magnetically-Guided Accretion onto the DR21 Ridge

Andrea Giannetti, Dan Clemens, Daniel Seifried, Enrique Lopez-Rodriguez, Evangelia Ntormousi, Fumitaka Nakamura, Gabriel Franco, Helmut Wiesemeyer, Jens Kauffmann, Juan D. Soler, Karl M. Menten, Koji Sugitani, Laura M. Fissel, Mark Heyer, Paul F. Goldsmith, Philip C. Myers, Stefan Reissl, Thushara G. S. Pillai

Projected gravity and magnetic fields remain aligned throughout the DR21 cloud at all densities

arxiv:2605.12604 v1 · 2026-05-12 · astro-ph.GA

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\usepackage{pith}
\pithnumber{IENDURP7D2YZ5J4ZPSOXB5K4TI}

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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

Our central finding is that vec g_pos and hat B_pos remain aligned throughout the cloud regardless of column density or environment, consistent with magnetically-guided accretion: sub-filaments channel material along field lines at several 10^{-3} M_sun yr^{-1}.

C2weakest assumption

The assumption that observed alignment between projected gravity and magnetic field directly indicates ongoing accretion along field lines, rather than other dynamical configurations or projection effects that could produce similar alignments without net mass flow.

C3one line summary

Magnetic fields remain aligned with projected gravity throughout the DR21 ridge and sub-filaments, indicating guided accretion at rates that can build the ridge in about one million years.

References

105 extracted · 105 resolved · 1 Pith anchors

[1] 2016, , 586, A138, 10.1051/0004-6361/201525896 2016 · doi:10.1051/0004-6361/201525896

[2] Andersson , B.-G., Lazarian , A., & Vaillancourt , J. E. 2015, , 53, 501, 10.1146/annurev-astro-082214-122414 2015 · doi:10.1146/annurev-astro-082214-122414

[3] 2014, in Protostars and Planets VI, ed 2014 · doi:10.2458/azu_uapress_9780816531240-ch002

[4] 2010, , 518, L102, 10.1051/0004-6361/201014666 2010 · doi:10.1051/0004-6361/201014666

[5] 2019, A&A, 621, A42, doi: 10.1051/0004-6361/201832725 Astropy Collaboration, Robitaille, T 2019 · doi:10.1051/0004-6361/201832725

Receipt and verification

First computed	2026-05-18T03:10:00.850109Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

411a3a45ff1eb19ea7997c9d70f55c9a301fd6d3ff8bd65bd798961bbed80dab

Aliases

arxiv: 2605.12604 · arxiv_version: 2605.12604v1 · doi: 10.48550/arxiv.2605.12604 · pith_short_12: IENDURP7D2YZ · pith_short_16: IENDURP7D2YZ5J4Z · pith_short_8: IENDURP7

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/IENDURP7D2YZ5J4ZPSOXB5K4TI \
  | 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: 411a3a45ff1eb19ea7997c9d70f55c9a301fd6d3ff8bd65bd798961bbed80dab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "25d88eee1e49f40be59ee1b3ce91272c2a46488afefc71da49566f79532877b6",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-05-12T18:00:07Z",
    "title_canon_sha256": "3491c0bc7225caae9fccc48f012a0b2ceaa3fe4ec63c83a8ce4bc2644d084bfb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.12604",
    "kind": "arxiv",
    "version": 1
  }
}