Pith Number

pith:FIORR7UL

pith:2026:FIORR7ULJYHY3H6IBZL45GKKWZ

not attested not anchored not stored refs pending

Probing Dark Matter Halos of High-redshift Quasars via Wide-Field Clustering

Guangping Ye (HUST), Hao Meng, Huanian Zhang

High-redshift quasars at z>5 reside in dark matter halos of roughly 10^12 solar masses, with duty cycles low enough to imply most black hole growth is obscured.

arxiv:2602.02778 v3 · 2026-02-02 · astro-ph.GA

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\usepackage{pith}
\pithnumber{FIORR7ULJYHY3H6IBZL45GKKWZ}

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Record completeness

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2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

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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

The dark matter halo mass of quasars estimated from the projected auto correlation function is log(M_h/M_⊙)=12.13 ± 0.07 (12.45 ± 0.14), with the bias parameter b of 14.80 ± 0.84 (24.18 ± 3.11) for the redshift interval of 5.0 ≤ z <5.6 (5.6 ≤ z <6.2). The duty cycle is 0.0002 ± 0.0001 (0.0021^{+0.0049}_{-0.0014}) aligning with the f_duty - M_halo scaling relation.

C2weakest assumption

The photometric quasar candidates selected via machine learning are sufficiently pure and the standard halo bias model from lower-redshift simulations applies without modification at z>5.

C3one line summary

High-redshift quasars at 5<z<6.2 reside in dark matter halos of log(M_h/M_sun) ~12.1-12.5 with duty cycles of 0.0002-0.002 indicating obscured black hole growth.

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-28T01:05:11.630701Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2a1d18fe8b4e0f8d9fc80e57ce994ab66fc784d7ae7d89123122d222e13d7700

Aliases

arxiv: 2602.02778 · arxiv_version: 2602.02778v3 · doi: 10.48550/arxiv.2602.02778 · pith_short_12: FIORR7ULJYHY · pith_short_16: FIORR7ULJYHY3H6I · pith_short_8: FIORR7UL

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/FIORR7ULJYHY3H6IBZL45GKKWZ \
  | 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: 2a1d18fe8b4e0f8d9fc80e57ce994ab66fc784d7ae7d89123122d222e13d7700

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "78084739be2c44a0af91efb0d77162e87b30d035f6457c7fb4939ce211177d44",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-02-02T20:33:51Z",
    "title_canon_sha256": "ae29462c279b4b9e99e90464c8a8c977636b1f197544c968b06f985f4c270cfa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2602.02778",
    "kind": "arxiv",
    "version": 3
  }
}