{
  "abstract": "Quantification of energy transport and dissipation in weakly collisional heliospheric plasmas that are far from local thermodynamic equilibrium is an outstanding scientific problem. A central challenge is determining how non-Maxwellian velocity-space structure affects damping and emission of coherent ion-scale waves, especially compared to simplified analytical models for background plasma velocity distributions. In this work, we study the damping and emission of parallel-propagating proton cyclotron waves for two models of proton velocity distributions measured by the SPAN-I instrument on board Parker Solar Probe during an extended storm of waves with left-hand polarization in the solar wind at a heliocentric distance of 30.1 solar radii. Using the measured velocity distribution rather than a two-component bi-Maxwellian model predicts instabilities consistent with the observed coherent waves. For intervals in which both models predict net damping, the observed VDF model yields weaker damping in 90\\% of cases, with a reduction in the integrated heating rate of 0.44 relative to the bi-Maxwellian model. These results suggest that simplified analytical velocity distribution models may overestimate cyclotron damping and underestimate wave emission in the near-Sun solar wind.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.10422",
  "author_total": 8,
  "authors": [
    {
      "name": "Kristopher G Klein"
    },
    {
      "name": "Daniel Verscharen"
    },
    {
      "name": "Mihailo Martinovic"
    },
    {
      "name": "Niranjana"
    },
    {
      "name": "Ali Rahmati"
    },
    {
      "name": "Roberto Livi"
    },
    {
      "name": "Davin Larson"
    },
    {
      "name": "Michael Stevens"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/a2byaepqjq82d.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.10422",
  "fulltext_url": null,
  "id": "a2byaepqjq82d",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.10422",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.SR"
    ],
    [
      "arxiv",
      "physics.plasm-ph"
    ],
    [
      "arxiv",
      "physics.space-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.10422",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-09",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/a2byaepqjq82d.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:12Z",
      "native_id": "2609.10422",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.10422"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.plasm-ph",
      "subfield": "plasma"
    }
  ],
  "title": "Wave Emission and Absorption in a Near-Sun Proton-Cyclotron Wave Storm",
  "title_text": "Wave Emission and Absorption in a Near-Sun Proton-Cyclotron Wave Storm",
  "type": "preprint",
  "updated_at": "2026-10-30T12:20:12Z",
  "url": "https://research.draconitic.com/paper/a2byaepqjq82d",
  "venue": "arXiv",
  "versions": []
}