{
  "abstract": "Parity invariance of general relativity imposes exact relations between waveforms and remnant properties of binary-black-hole configurations related by reversal of the in-plane spins and observer direction. We summarize these relations and construct consistency tests for spin-precessing waveform and remnant models. Applying a conservative, unmaximized overlap diagnostic to seven state-of-the-art waveform models, we find that models built from aligned-spin calibrated waveforms and parity-covariant precession dynamics satisfy the symmetry to numerical precision. The original \\texttt{IMRPhenomXO4a} and \\texttt{IMRPhenomXPNR} implementations instead exhibit median parity residuals of approximately $1.6\\times10^{-3}$ with broad upper tails, while \\texttt{NRSur7dq4} shows its largest violations at high mass ratio and large spin magnitude. The asymmetric extension of \\texttt{SEOBNRv5PHM} exhibits a smaller, localized violation, while \\texttt{NRSur7dq4Remnant} shows larger residuals in the recoil than in the final mass and spin. We trace these violations to an observer-dependent phase anchor in the \\texttt{IMRPhenom} antisymmetric mode, non-invariant parameterization of the \\texttt{NRSur7dq4} surrogate fits, and one non-invariant NR-calibrated coefficient in the asymmetric \\texttt{SEOBNRv5PHM} extension. Local corrections restore waveform parity to numerical precision for the \\texttt{IMRPhenom} and \\texttt{SEOBNRv5PHM} cases; restoring it in \\texttt{NRSur7dq4} requires refitting the surrogate. Reanalyses of eight GWTC-5.0 events show no qualitative change in astrophysical interpretation, although the \\texttt{IMRPhenom} correction yields Jensen-Shannon divergences up to $5\\times10^{-2}$ in individual marginalized posteriors. Exact symmetries thus provide inexpensive, model-independent consistency tests and should be imposed by construction in calibrated waveform models.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.10345",
  "author_total": 6,
  "authors": [
    {
      "name": "Héctor Estellés"
    },
    {
      "name": "Sascha Husa"
    },
    {
      "name": "Eleanor Hamilton"
    },
    {
      "name": "Cecilio García-Quirós"
    },
    {
      "name": "Panagiota Kolitsidou"
    },
    {
      "name": "Joan Llobera-Querol"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/ctxyr71dq8ek2.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.10345",
  "fulltext_url": null,
  "id": "ctxyr71dq8ek2",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.10345",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "gr-qc"
    ],
    [
      "openalex",
      "3103|Pulsars and Gravitational Waves Research"
    ]
  ],
  "openalex": "W7212185662",
  "pdf_url": "https://arxiv.org/pdf/2609.10345",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-09",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/ctxyr71dq8ek2.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:12Z",
      "native_id": "2609.10345",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.10345"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Parity symmetry as a diagnostic for spin-precessing binary-black-hole waveform models",
  "title_text": "Parity symmetry as a diagnostic for spin-precessing binary-black-hole waveform models",
  "type": "preprint",
  "updated_at": "2026-10-30T12:20:12Z",
  "url": "https://research.draconitic.com/paper/ctxyr71dq8ek2",
  "venue": "arXiv",
  "versions": []
}