{
  "abstract": "Context. Detached eclipsing binaries (DEBs) provide model-independent measurements of stellar masses and radii, which are essential for testing stellar-evolution models and calibrating space-based photometric missions.\n\nAims. We aim to deliver ultra-precise fundamental parameters for the DEB UX Men and to assess its suitability as a benchmark for upcoming missions such as PLATO . We evaluate the temporal stability of the photometric solutions and the way intrinsic stellar variability and instrumental systematics affect the derived parameters.\n\nMethods. We analysed 31 TESS sectors (∼882 d) with the LIGHTKURVE package, and detrended spot-induced variability. Light-curve modelling was performed independently with JKTEBOP and ALLESFITTER . Radial velocities from HARPS (HAM/EGGS), FEROS, CORALIE, and UCLES were extracted via TODCOR and fitted with a Keplerian orbit. Spectral disentangling (5350–5800 Å) yielded individual component spectra, which were processed with ISPEC to determine T eff , [M/H], and micro- and macroturbulence. Eclipse-timing variations were examined through O-C diagrams. We also used multi-band photometry to determine the fluxes, flux ratios, and ultimately, to measure the photometric T eff .\n\nResults. We obtained masses of M A = 1.2300 ± 0.0012 M ⊙ , M B = 1.1946 ± 0.0012 M ⊙ and radii of R A = 1.3605 ± 0.0031 R ⊙ , R B = 1.2801 ± 0.0069 R ⊙ , with a sub-percent precision. Uncertainties were found to be dominated by systematic effects coming from (weak) stellar activity. The metallicity estimates are [ M / H ] A = 0.02 ± 0.13 dex and [ M / H ] B = 0.07 ± 0.10 dex. An isochrone fitting yielded a consistent age of τ = 2.75 ± 0.13 Gyr. The system exhibits a ∼673-day periodicity in eclipse-timing variations, likely due to stellar activity, with no evidence of a third body.\n\nConclusions. UX Men is a high-precision benchmark binary, providing stringent tests of stellar models and a robust calibration source for PLATO ’s determination of stellar and exoplanet properties. We found no dependence between the results and the specific code that was employed. However, without a proper treatment of systematics caused by activity, the uncertainties would end up underestimated. Expanding the sample of similarly well-characterised DEBs will further strengthen the empirical foundation for stellar physics and improve the calibration of future photometric missions.",
  "abstract_shown": true,
  "affiliations": [
    "Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences",
    "Department of Physics and Astronomy, Uppsala University",
    "Private Researcher",
    "Astrophysics Group, Keele University",
    "Villanova University, Dept. of Astrophysics and Planetary Sciences"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "G. N. Pawar",
      "orcid": "0000-0003-3639-9052"
    },
    {
      "affs": [
        0
      ],
      "name": "K. G. Hełminiak",
      "orcid": "0000-0002-7650-3603"
    },
    {
      "affs": [
        1
      ],
      "name": "N. J. Miller",
      "orcid": "0000-0001-9550-1198"
    },
    {
      "affs": [
        2
      ],
      "name": "F. Marcadon",
      "orcid": "0000-0002-7606-7733"
    },
    {
      "affs": [
        3
      ],
      "name": "A. Moharana",
      "orcid": "0000-0002-9616-512X"
    },
    {
      "affs": [
        4
      ],
      "name": "T. B. Pawar"
    },
    {
      "affs": [
        0
      ],
      "name": "A. Kalsi",
      "orcid": "0009-0002-4504-873X"
    },
    {
      "affs": [
        0
      ],
      "name": "M. Konacki"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/47s3bm31385xd.bib",
  "cited_by": 0,
  "doi": "10.1051/0004-6361/202659300",
  "fulltext_url": null,
  "id": "47s3bm31385xd",
  "issns": [
    "0004-6361",
    "1432-0746"
  ],
  "landing_url": "https://www.aanda.org/10.1051/0004-6361/202659300",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3103|Stellar, planetary, and galactic studies"
    ]
  ],
  "openalex": "W7212236072",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-29",
  "publisher": "EDP Sciences",
  "ris": "https://research.draconitic.com/paper/47s3bm31385xd.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:18Z",
      "native_id": "10.1051/0004-6361/202659300",
      "source": "crossref",
      "url": "https://www.aanda.org/10.1051/0004-6361/202659300"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Stellar, planetary, and galactic studies",
      "subfield": "stellar"
    }
  ],
  "title": "UX Men: Detached eclipsing binary as a benchmark candidate",
  "title_text": "UX Men: Detached eclipsing binary as a benchmark candidate",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:18Z",
  "url": "https://research.draconitic.com/paper/47s3bm31385xd",
  "venue": "Astronomy & Astrophysics",
  "versions": []
}