Pith Number

pith:V2GQSD3U

pith:2025:V2GQSD3UFV7DUJINIXA5ICEQLS

not attested not anchored not stored refs resolved

A "Black Hole Star" Reveals the Remarkable Gas-Enshrouded Hearts of the Little Red Dots

Aaron Smith, Akio K. Inoue, Alba Covelo-Paz, Alberto Torralba, Andrea Weibel, Andy Goulding, Anna de Graaff, Arjen van der Wel, Benjamin D. Johnson, Bingjie Wang, Callum Witten, Darach Watson, David J. Setton, David Sobral, Ecaterina Leonova, Emma Giovinazzo, Erica Nelson, Fabian Walter, Gabriel Brammer, Garth Illingworth, Hakim Atek, Harley Katz, Ian McConachie, Irene Shivaei, Ivo Labb\'e, Jenny E. Greene, Joel Leja, John Chisholm, Jorryt Matthee, Josephine F. W. Baggen, Kasper E. Heintz, Leindert A. Boogaard, Lukas J. Furtak, Marta Volonteri, Mauro Stefanon, Max Gronke, Michaela Hirschmann, Michael V. Maseda, Pascal Oesch, Pieter van Dokkum, Pratika Dayal, Priyamvada Natarajan, Rachel Bezanson, Raphael Hviding, Robert A. Simcoe, Rohan P. Naidu, Sandro Tacchella, Sirio Belli, Sownak Bose, Sune Toft, Yoshinobu Fudamoto

A high-redshift source is modeled as a black hole star with a dense gas atmosphere, implying overestimated black hole masses in Little Red Dots.

arxiv:2503.16596 v1 · 2025-03-20 · astro-ph.GA · astro-ph.CO · astro-ph.HE · astro-ph.SR

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\pithnumber{V2GQSD3UFV7DUJINIXA5ICEQLS}

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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

We model this source as a black hole star (BH*) where the Balmer break and absorption features are a result of extremely dense, turbulent gas forming a dust-free atmosphere around a supermassive black hole. This source provides evidence that black hole masses in the LRDs may be over-estimated by orders of magnitude.

C2weakest assumption

The assumption that the observed light is dominated by radiation from the BH* with only limited host galaxy contribution, combined with the premise that the gas is completely dust-free, which underpins both the spectral fit and the claim of order-of-magnitude mass overestimation.

C3one line summary

A source 660 million years after the Big Bang is interpreted as a black hole star with a dust-free dense gas atmosphere, implying Little Red Dots have black hole masses overestimated by orders of magnitude.

References

95 extracted · 95 resolved · 24 Pith anchors

[1] Mirage or Miracle 2023

[2] Ba ˜nados, E. et al. An 800-million-solar-mass black hole in a sig- nificantly neutral Universe at a redshift of 7.5. Nature 553, 473– 476 (2018) 2018

[3] P¯oniu¯a’ena: A Luminous z = 7.5 Quasar Hosting a 1.5 Billion Solar Mass Black Hole 2020

[4] A Luminous Quasar at Redshift 7.642 2021

[5] Woods, T. E. et al. Titans of the early Universe: The Prato state- ment on the origin of the first supermassive black holes. PASA 36, e027 (2019). 1810.12310 2019

Formal links

2 machine-checked theorem links

Cited by

24 papers in Pith

(LRDs)$^2$: The Low-ReDshift Little Red Dots Survey. II. DESI DR1 Sample

A Magnetized Black Hole Envelope Model for Little Red Dots

The Structure and Evolution of LRDs: Insights from JWST NIRSpec Medium and High Resolution Spectroscopy at $z\sim4$

Spectral Uniformity of Little Red Dots: A Natural Outcome of Coevolving Seed Black Holes and Nascent Starbursts

The AGN nature of strong CIII emitters in the Early Universe with JWST

Receipt and verification

First computed	2026-05-17T23:38:48.448517Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ae8d090f742d7e3a250d45c1d408905cb78991a024bfa1b4dcfc1b21048c9843

Aliases

arxiv: 2503.16596 · arxiv_version: 2503.16596v1 · doi: 10.48550/arxiv.2503.16596 · pith_short_12: V2GQSD3UFV7D · pith_short_16: V2GQSD3UFV7DUJIN · pith_short_8: V2GQSD3U

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/V2GQSD3UFV7DUJINIXA5ICEQLS \
  | 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: ae8d090f742d7e3a250d45c1d408905cb78991a024bfa1b4dcfc1b21048c9843

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8cef503a3d40dd4e473b971026ca8d98c43b4a6f31a3fd50c59c75fee1f6bf5a",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.HE",
      "astro-ph.SR"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2025-03-20T18:00:00Z",
    "title_canon_sha256": "3ccef1346c3c81963a816d2db834749180729dcfb9bb17a3ff31777db975a0c9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2503.16596",
    "kind": "arxiv",
    "version": 1
  }
}