{
  "abstract": "We leverage the high resolution and spectral stability of the Keck Planet Finder (KPF) spectrograph to investigate macroturbulence broadening via the stellar cross-correlation function (CCF). As our calibration sample, we use main sequence benchmark slow-rotators v$\\sin$i < 4 km/s where rotation rates were derived from the most robust asteroseismic mode splitting measurements, independent from spectral line broadening. We fit a linear relationship for macroturbulence as a function of derived $ν_{max}$, the frequency of maximum power due to stellar oscillations, with an RMS scatter of 90 m/s. Previous studies have calibrated macroturbulence against T$_{eff}$, but we find $ν_{max}$ to be a lower dispersion predictor by a factor of 4 indicating a deeper relationship between $ν_{max}$and convective motions.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.17693",
  "author_total": 9,
  "authors": [
    {
      "name": "Jack Lubin"
    },
    {
      "name": "Erik Petigura"
    },
    {
      "name": "Kento Masuda"
    },
    {
      "name": "Samuel Halverson"
    },
    {
      "name": "Isabel Angelo"
    },
    {
      "name": "Daniel Huber"
    },
    {
      "name": "Michael L. Palumbo III"
    },
    {
      "name": "Songhu Wang"
    },
    {
      "name": "Xian-Yu Wang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/a5tx0kpa7g81v.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.17693",
  "fulltext_url": null,
  "id": "a5tx0kpa7g81v",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.17693",
  "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.EP"
    ],
    [
      "arxiv",
      "astro-ph.SR"
    ],
    [
      "openalex",
      "3103|Stellar, planetary, and galactic studies"
    ]
  ],
  "openalex": "W7213525066",
  "pdf_url": "https://arxiv.org/pdf/2609.17693",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/a5tx0kpa7g81v.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:22:01Z",
      "native_id": "2609.17693",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.17693"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.EP",
      "subfield": "planetary"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "Predicting Macroturbulence in F/G/K Dwarfs to 100 m/s Precision",
  "title_text": "Predicting Macroturbulence in F/G/K Dwarfs to 100 m/s Precision",
  "type": "preprint",
  "updated_at": "2026-10-30T12:22:01Z",
  "url": "https://research.draconitic.com/paper/a5tx0kpa7g81v",
  "venue": "arXiv",
  "versions": []
}