{
  "abstract": "Strong gravitational lensing tightly constrains the projected mass within the Einstein aperture, but what else imaging alone can recover for edge-on disc lenses remains untested against known truth. We construct HST/ACS-like mock observations of 35 edge-on TNG50 disc galaxies selected to resemble lenses from the Sloan WFC Edge-on Late-type Lens Survey (SWELLS), and fit them with a five-stage Source-Light-and-Mass workflow in PyAutoLens; the final model represents the lens mass distribution by scaling the Multi-Gaussian Expansion (MGE) foreground-light template with a global mass-to-light ratio and adding a spherical NFW halo. Decomposed fits succeed for 21 of the 35 systems; in the other 14, coherent MGE lens-light residuals prevent reliable modelling. For the successful subset, the Einstein radius and the total aperture mass are recovered with normalised median absolute deviation (NMAD) scatters of 0.3% and 0.7%. The global projected mass-weighted slope has an NMAD scatter of 10.3%, smaller than that of the mass-sheet-invariant reduced deflection curvature $ξ$ (11.4%) and well below that of the local slope (40.7%), while the stellar and dark-matter aperture masses scatter by 15.1% and 108.8%. A 35-system true-light diagnostic using the exact input light gives component-mass scatters of 0.8% and 6.3%. Under these controlled assumptions, imaging constrains Einstein-scale total mass and global radial structure more reliably than local radial structure or the stellar-dark-matter decomposition.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.03084",
  "author_total": 4,
  "authors": [
    {
      "name": "Zheng Fang"
    },
    {
      "name": "Xiaoyue Cao"
    },
    {
      "name": "Ran Li"
    },
    {
      "name": "Weipeng Lin"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/ew28b1spgweex.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.03084",
  "fulltext_url": null,
  "id": "ew28b1spgweex",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.03084",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.GA"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.03084",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-02",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/ew28b1spgweex.ris",
  "sources": [
    {
      "first_seen": "2026-11-03T12:20:59Z",
      "native_id": "2611.03084",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.03084"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "What can strong lensing recover in edge-on disc galaxies? A mock study based on TNG50 simulations",
  "title_text": "What can strong lensing recover in edge-on disc galaxies? A mock study based on TNG50 simulations",
  "type": "preprint",
  "updated_at": "2026-11-05T15:20:18Z",
  "url": "https://research.draconitic.com/paper/ew28b1spgweex",
  "venue": "arXiv",
  "versions": []
}