{
  "abstract": "We investigate the differential luminosity response of the optical Balmer series from H8 to H-alpha in Galactic B5-A5 luminous stars using homogeneous measurements of central depth, FWHM, and equivalent width at a resolving power of approximately 12,000. Direct line-to-line comparisons show a systematic change in the central-depth response toward the lower-order transitions. For the primary 72-star luminosity sample, the fitted luminosity coefficients show an overall positive trend with upper-level quantum number, with a point-estimate gradient of dq/dn = 0.0419. A joint Monte Carlo analysis with 10,000 realisations gives a median dq/dn = 0.0387 and a 95 percent interval from 0.0253 to 0.0532, with no non-positive gradients obtained. The higher-order H8-H-delta coefficients form a statistically unresolved plateau, followed by a well-supported increase in response magnitude from H-delta toward H-alpha. The result is robust to the adopted effective-temperature scale. The FWHM coefficients show no comparable Balmer-order progression, and the directly fitted profile-shape response is consistent with zero from H8 through H-beta. For H-alpha, the full logarithmic sample is not formally significant, whereas removal of the three remaining strongly filled-core profiles yields a significantly negative shape response. The observed behaviour is qualitatively compatible with the systematic variation of pressure broadening across the Balmer series, while the enhanced H-alpha response may additionally reflect non-LTE and wind-related effects.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.18810",
  "author_total": 6,
  "authors": [
    {
      "name": "N. L. Vaidman"
    },
    {
      "name": "S. A. Khokhlov"
    },
    {
      "name": "Sh. T. Nurmakhametova"
    },
    {
      "name": "N. A. Litvinov"
    },
    {
      "name": "A. T. Agishev"
    },
    {
      "name": "D. A. Alimbetova"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4f37an63043q8.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.18810",
  "fulltext_url": null,
  "id": "4f37an63043q8",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.18810",
  "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|Stellar, planetary, and galactic studies"
    ]
  ],
  "openalex": "W7221832274",
  "pdf_url": "https://arxiv.org/pdf/2610.18810",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-13",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4f37an63043q8.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:11Z",
      "native_id": "2610.18810",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.18810"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "Differential Luminosity Response of Balmer-Line Profiles in Galactic B/A Luminous Stars",
  "title_text": "Differential Luminosity Response of Balmer-Line Profiles in Galactic B/A Luminous Stars",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:11Z",
  "url": "https://research.draconitic.com/paper/4f37an63043q8",
  "venue": "arXiv",
  "versions": []
}