Pith Number

pith:UBOOMHMY

pith:2026:UBOOMHMYSHJV4H27XR66NF6HBM

not attested not anchored not stored refs resolved

Characterizing and spectrally modeling embedded FUor eruptions in the near-infrared

Jiaxun Li, Tinggui Wang, Zheyu Lin

Near-infrared spectra and disk models confirm infrared-selected young stellar objects as embedded FUor eruptions with high extinction.

arxiv:2604.19551 v1 · 2026-04-21 · astro-ph.SR · astro-ph.GA

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\usepackage{pith}
\pithnumber{UBOOMHMYSHJV4H27XR66NF6HBM}

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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

All objects show CO and H2O absorption bands at 2.3μm, and their positions in the Na + Ca versus CO equivalent width diagram further corroborate their classification as FUors. The best-fitting model spectra closely match both the observed spectral features and the overall continuum. The best-fit models reveal high extinction values (A_V = 10-20 mag), with M_* Mdot comparable to those of classical FUors such as FU Orionis. Among 18 sources initially selected via infrared light curves, 6-7 out of 8 with available spectra exhibit FUor characteristics, implying a high selection efficiency.

C2weakest assumption

That the observed CO/H2O absorption bands, equivalent width diagram positions, and disk model fits (with actively accreting inner disk plus passively irradiated outer disk) uniquely and reliably confirm FUor classification for these highly extincted sources without significant degeneracies or alternative explanations.

C3one line summary

Four infrared-selected young stellar objects are confirmed as FUor eruptions via CO and H2O absorption features, equivalent width diagrams, and disk models showing high extinction and accretion rates comparable to classical FUors.

References

53 extracted · 53 resolved · 0 Pith anchors

[1] 2014, in IAU Symposium, V ol 2014

[2] Audard, M., Ábrahám, P., Dunham, M. M., et al. 2014, in Protostars and Planets VI, ed. H. Beuther, R. S. Klessen, C. P. Dullemond, & T. Henning, 387–410 2014

[3] Bae, J., Hartmann, L., Zhu, Z., & Nelson, R. P. 2014, ApJ, 795, 61 2014

[4] Bock, J. J., Aboobaker, A. M., Adamo, J., et al. 2026, ApJ, 999, 139 2026

[5] Carvalho, A. S., Hillenbrand, L. A., Hambsch, F.-J., et al. 2023, ApJ, 953, 86 2023

Receipt and verification

First computed	2026-06-03T14:05:24.908362Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a05ce61d9891d35e1f5fbc7de697c70b1cdff8ec4089f20c2b85ee39d938499e

Aliases

arxiv: 2604.19551 · arxiv_version: 2604.19551v1 · doi: 10.48550/arxiv.2604.19551 · pith_short_12: UBOOMHMYSHJV · pith_short_16: UBOOMHMYSHJV4H27 · pith_short_8: UBOOMHMY

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/UBOOMHMYSHJV4H27XR66NF6HBM \
  | 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: a05ce61d9891d35e1f5fbc7de697c70b1cdff8ec4089f20c2b85ee39d938499e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7fd7921487a999beef5867f843b72e8aff1ffca2eeb6826983cae1d11fdb9ae8",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2026-04-21T15:07:07Z",
    "title_canon_sha256": "e6a785d2495d408eaaec076ca9304f2d327ef53f5c870625cd7d7542ce931b68"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.19551",
    "kind": "arxiv",
    "version": 1
  }
}