Pith Number

pith:C3WMFIDQ

pith:2026:C3WMFIDQAJQEVIIX64WCGNIAPT

not attested not anchored not stored refs resolved

Quantitative Spectroscopic Diagnostics for FU Orionis-Type Young Stellar Objects

Adolfo S. Carvalho, Evan R. Portnoi, Lynne A. Hillenbrand

Near-infrared spectral features distinguish FU Orionis outburst disks from normal stars.

arxiv:2605.12795 v1 · 2026-05-12 · astro-ph.SR

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\usepackage{pith}
\pithnumber{C3WMFIDQAJQEVIIX64WCGNIAPT}

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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

By considering the relative distributions of these samples in our defined spectral diagnostics, we propose a number of parameter spaces that can distinguish FUOr disks from normal stars.

C2weakest assumption

That the selected atomic and molecular features remain distinctive across the full range of FUOr viewing angles, disk inclinations, and evolutionary stages, and that the control sample adequately represents the contaminants expected in photometric candidate lists.

C3one line summary

Quantitative near-IR diagnostics based on equivalent widths and band ratios distinguish FUOr disks from normal late-type stars using spectra of 28 known objects.

References

43 extracted · 43 resolved · 3 Pith anchors

[1] Journal of Open Source Software , year = 2024, doi = 2024

[2] FUSE Measurements of Far-Ultraviolet Extinction. III. The Dependence of R(V) and Discrete Feature Limits From 75 Galactic Sightlines. , year = 2009, doi = 2009

[3] , year = 2018, doi = 2018

[4] , year = 2010, doi = 2010

[5] , year = 2021, doi = 2021

Receipt and verification

First computed	2026-05-18T03:09:12.819779Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

16ecc2a07002604aa117f72c2335007cf6b9874226d2f23530647d7a87ba40c7

Aliases

arxiv: 2605.12795 · arxiv_version: 2605.12795v1 · doi: 10.48550/arxiv.2605.12795 · pith_short_12: C3WMFIDQAJQE · pith_short_16: C3WMFIDQAJQEVIIX · pith_short_8: C3WMFIDQ

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/C3WMFIDQAJQEVIIX64WCGNIAPT \
  | 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: 16ecc2a07002604aa117f72c2335007cf6b9874226d2f23530647d7a87ba40c7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2d644b5327d7ed8be2e7057dde8b28722d34a4a7200648b74436aedca842739f",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2026-05-12T22:21:40Z",
    "title_canon_sha256": "296bd16fff52450690e78d3b33270a90cfe78ee63107a5820639168bd8aef839"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.12795",
    "kind": "arxiv",
    "version": 1
  }
}