{
  "abstract": "Dwarf and low-mass galaxies are highly sensitive to stellar feedback and gas flows, yet their spatially resolved gas-phase metallicity remains poorly characterised. We measure radial gas-phase metallicity gradients for 382 star-forming low-mass galaxies from MaNGA DR17, spanning $7.2 \\leq \\log(M_{\\star}/M_{\\odot}) \\leq 9.1$ and $z \\leq 0.05$. Spectra are stacked in elliptical radial bins and metallicity is derived from the N2 index. After removing the primary dependence on local stellar mass surface density, we define a residual metallicity $ΔZ$ to isolate secondary dependencies. Gradients are flat on average (median slope $-0.007$\\,dex\\,$R_e^{-1}$). The residual gradients correlate most strongly with light concentration ($r = 0.304$, $r^2 = 0.092$, $p < 0.001$) and gas velocity dispersion ($r = 0.204$, $p < 0.001$), though both account for at most 9 per cent of the variance. Large-scale environment shows no significant correlation. The concentration result is robust to measurement uncertainties and persists with a stricter resolution cut, suggesting internal structural properties shape the radial metal distribution in low-mass galaxies.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.39689",
  "author_total": 5,
  "authors": [
    {
      "name": "Anuroop Dasgupta"
    },
    {
      "name": "Namrata Roy"
    },
    {
      "name": "Saumyadip Samui"
    },
    {
      "name": "Ritaban Chatterjee"
    },
    {
      "name": "Fuyan Bian"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3a0578fkasc8d.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.39689",
  "fulltext_url": null,
  "id": "3a0578fkasc8d",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.39689",
  "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.GA"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.39689",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3a0578fkasc8d.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:49Z",
      "native_id": "2609.39689",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.39689"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "Internal Structure, Not Environment, Shapes Metallicity Gradients in Low-Mass Galaxies from MaNGA",
  "title_text": "Internal Structure, Not Environment, Shapes Metallicity Gradients in Low-Mass Galaxies from MaNGA",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:49Z",
  "url": "https://research.draconitic.com/paper/3a0578fkasc8d",
  "venue": "arXiv",
  "versions": []
}