Pith Number

pith:DECDXAQ5

pith:2026:DECDXAQ56G7VL2IHZEYALFZVHF

not attested not anchored not stored refs resolved

SDSS-V LVM: Verifying what, and where, the 'Galactic Center' Lobe is

A. Meija, A. Roman-Lopes, A. Z. Lugo-Aranda, C. G. Roman-Zuniga, D. Bizyaev, E. Egorova, E. J. Johnston, E. Zari, F.-H. Liang, G. A. Blanc, H.-W. Rix, I. Katkov, J. D. Gelfand, J. E. Mendez-Delgado, J. G. Fernandez-Trincado, J. Kollmeier, J. R. Brownstein, K. Kreckel, K. S. Long, N. Drory, N. Sattler, O. V. Egorov, P. Garcia, R. de J. Zermeno, S. F. Sanchez, S. Kabanovic

New optical spectroscopy shows the Galactic Center Lobe is a foreground HII region at roughly 2 kpc, not at the galactic center.

arxiv:2604.16601 v1 · 2026-04-17 · astro-ph.GA

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\usepackage{pith}
\pithnumber{DECDXAQ56G7VL2IHZEYALFZVHF}

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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

Using new optical integral field spectroscopic observations from the SDSS-V Local Volume Mapper, we confirm the characterization of the GCL as a foreground photoionized HII region, not associated with the Galactic center. ... we directly constrain the distance to the GCL to ~2 kpc.

C2weakest assumption

That the comparison of Balmer decrement reddening with 3D dust maps provides an accurate distance constraint, and that the [SIII]9532 emission fully traces the morphology without significant biases from extinction or incomplete coverage.

C3one line summary

The Galactic Center Lobe is a foreground HII region at ~2 kpc, photoionized and forming a closed outer loop, not a Galactic center feature.

References

114 extracted · 114 resolved · 5 Pith anchors

[1] " * write output.state after.block = add.period write newline

[2] write newline

[3] J., Tielens , A 1989 · doi:10.1086/191396

[4] D., Armentrout , W 2015 · doi:10.1088/0067-0049/221/2/26

[5] D., Bania , T 2014 · doi:10.1088/0067-0049/212/1/1

Receipt and verification

First computed	2026-06-19T16:10:37.588470Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

19043b821df1bf55e907c930059735394a1ff32e4cbf0fcebe6af17b74879d37

Aliases

arxiv: 2604.16601 · arxiv_version: 2604.16601v1 · doi: 10.48550/arxiv.2604.16601 · pith_short_12: DECDXAQ56G7V · pith_short_16: DECDXAQ56G7VL2IH · pith_short_8: DECDXAQ5

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/DECDXAQ56G7VL2IHZEYALFZVHF \
  | 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: 19043b821df1bf55e907c930059735394a1ff32e4cbf0fcebe6af17b74879d37

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "02a5ef80d496d2c85abc6b14a09fc55db14234ea88af044d012380a10ac4e7c6",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-04-17T18:00:02Z",
    "title_canon_sha256": "60fa997f899897ed2da4e063bc69d5a2af3a633f19347f99ab8ceb49cb433b99"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.16601",
    "kind": "arxiv",
    "version": 1
  }
}