{
  "abstract": "The solar polar field plays a fundamental role in predicting solar-cycle strength and determines the large-scale structure of the heliospheric magnetic field. The High Resolution Telescope of the Polarimetric and Helioseismic Imager aboard Solar Orbiter (SO/PHI-HRT) provides unprecedented observations of the solar polar regions, as Solar Orbiter currently reaches heliographic latitudes of up to $\\pm17^\\circ$, about $10^\\circ$ higher than those accessible from near-ecliptic observations. Using these observations to further test surface flux transport models, we present a successful simulation of the SO/PHI-HRT observations, reproducing the latitudinal profiles of the longitudinally averaged radial magnetic field in both polar regions. This result is achieved using the meridional-flow profile proposed by \\citet{WangRH2026}, which also reproduces the evolution of the axial dipole strength, magnetic butterfly diagram, and high-latitude magnetic fields observed by SDO/HMI during Solar Cycle 25. We further compare simulations using this profile with simulations employing two representative meridional-flow profiles characterized by different peak latitudes. The latter fail to reproduce the observed high-latitude and polar fields. The comparison demonstrates that the meridional-flow profile strongly regulates poleward flux transport and the resulting polar-field evolution. Profiles peaking at higher latitudes produce stronger flux surges, and stronger and more concentrated polar fields. These results provide new constraints on the large-scale solar meridional flow.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.32194",
  "author_total": 5,
  "authors": [
    {
      "name": "Ruihui Wang"
    },
    {
      "name": "Jie Jiang"
    },
    {
      "name": "Yukun Luo"
    },
    {
      "name": "D. Calchetti"
    },
    {
      "name": "S. K. Solanki"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/607mv853h2ccc.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.32194",
  "fulltext_url": null,
  "id": "607mv853h2ccc",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.32194",
  "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"
    ],
    [
      "openalex",
      "3103|Solar and Space Plasma Dynamics"
    ]
  ],
  "openalex": "W7214778708",
  "pdf_url": "https://arxiv.org/pdf/2609.32194",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-26",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/607mv853h2ccc.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:12Z",
      "native_id": "2609.32194",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.32194"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "Successfully Reproducing Solar Orbiter Polar Field Observations with a Surface Flux Transport Model",
  "title_text": "Successfully Reproducing Solar Orbiter Polar Field Observations with a Surface Flux Transport Model",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:12Z",
  "url": "https://research.draconitic.com/paper/607mv853h2ccc",
  "venue": "arXiv",
  "versions": []
}