{
  "abstract": "U-shaped radial age profiles have recently been reported in low-mass galaxies. This type of profile differs from the usually observed positive radial age gradients of the low-mass regime. We aim to characterise the environment in which low-mass galaxies with U-shaped age profiles are more commonly found. We use the IllustrisTNG-50 hydrodynamical simulations to select a sample of galaxies with stellar masses ranging from $10^9 \\, M_\\odot$ to $10^{10} \\, M_\\odot$. Based on their radial age profiles, we classify the sample into galaxies with and without a U-shaped feature. We define a U-shaped profile as one where stellar ages decrease towards a local minimum and subsequently increase, requiring an age contrast of at least 0.4 Gyr on either side of the minimum relative to its value. We find 145 galaxies with U-shaped age profiles ($\\sim 11\\%$ of the sample). They are mostly central systems ($\\sim 72\\%$) and $\\sim 82\\%$ of them reside within low-mass halos ($M_{200} < 10^{12} \\, M_\\odot$). We also find that galaxies exhibiting this feature are located at large distances from galaxy groups but close to cosmic filaments, with a median distance of $\\sim 265$ kpc, whereas those without U-shaped age profiles tend to be located farther away from these structures ($\\sim 351$ kpc).",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.06632",
  "author_total": 6,
  "authors": [
    {
      "name": "Elisa A. Tau"
    },
    {
      "name": "Diego Pallero"
    },
    {
      "name": "Rory Smith"
    },
    {
      "name": "Raúl Baier-Soto"
    },
    {
      "name": "Antonela Monachesi"
    },
    {
      "name": "Silvio Varela-Lavin"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5cm17m332gdjy.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.06632",
  "fulltext_url": null,
  "id": "5cm17m332gdjy",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.06632",
  "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/2611.06632",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-04",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5cm17m332gdjy.ris",
  "sources": [
    {
      "first_seen": "2026-11-05T15:20:56Z",
      "native_id": "2611.06632",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.06632"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "Living near filaments: How environment shapes age profiles in low-mass galaxies",
  "title_text": "Living near filaments: How environment shapes age profiles in low-mass galaxies",
  "type": "preprint",
  "updated_at": "2026-11-09T00:20:20Z",
  "url": "https://research.draconitic.com/paper/5cm17m332gdjy",
  "venue": "arXiv",
  "versions": []
}