Pith Number

pith:UHBPKM3M

pith:2026:UHBPKM3MAUIPXVFQ2VI6JSSFWG

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QPOs from the Viscous Transonic Accretion Flow Around a Spinning Black Hole

Indranil Chattopadhyay, M. Saleem Khan, Priyesh Kumar Tripathi, Raj Kishor Joshi, Sanjit Debnath, Soumyadip Mandal

The frequency range of QPOs in viscous accretion flows depends strongly on black hole spin.

arxiv:2604.19692 v2 · 2026-04-21 · astro-ph.HE

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\usepackage{pith}
\pithnumber{UHBPKM3MAUIPXVFQ2VI6JSSFWG}

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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

Our results show that the frequency range of quasi-periodic oscillations (QPOs) obtained from the power density spectra depends strongly on the black hole spin. Low-spin systems predominantly exhibit low-frequency QPOs, whereas rapidly rotating black holes (0.9) produce QPOs spanning a broad range from low to high frequencies, comparable to those observed in black hole X-ray binaries.

C2weakest assumption

The spacetime of a Kerr black hole is approximated using a pseudo-potential, which may not fully capture all relativistic effects in the viscous flow dynamics leading to shock oscillations.

C3one line summary

Viscous shock oscillations in transonic flows around spinning black holes yield QPO frequency ranges that broaden with increasing spin and match observations in black hole X-ray binaries.

Receipt and verification

First computed	2026-06-01T01:03:53.524363Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a1c2f5336c0510fbd4b0d551e4ca45b190a5ff78851625fb910c2ccb21d504db

Aliases

arxiv: 2604.19692 · arxiv_version: 2604.19692v2 · doi: 10.48550/arxiv.2604.19692 · pith_short_12: UHBPKM3MAUIP · pith_short_16: UHBPKM3MAUIPXVFQ · pith_short_8: UHBPKM3M

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/UHBPKM3MAUIPXVFQ2VI6JSSFWG \
  | 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: a1c2f5336c0510fbd4b0d551e4ca45b190a5ff78851625fb910c2ccb21d504db

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "74be07770c9e03478512605686781a7b8028b21f213b81dac5e34bf360ce74e7",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2026-04-21T17:15:30Z",
    "title_canon_sha256": "c67ad38b341ed0d4d753b97aaab57ba45fec6f98cb91b60b60fe5b83af0f910d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.19692",
    "kind": "arxiv",
    "version": 2
  }
}