{
  "abstract": "Line-locking (LL) signatures in quasar absorption-line systems provide direct observational evidence for radiatively driven outflows. We present a detailed investigation of LL phenomena in the quasar SDSS J004613.54+010425.7 ($z_{\\rm em} = 2.150$) using medium-resolution VLT/X-shooter spectra, as part of the TOLL project. Compared with previous studies based on Sloan Digital Sky Survey spectroscopy, the X-shooter data resolve the absorption complex into twelve narrow absorption line (NAL) components spanning $\\sim$$2700$ km/s in the C IV, N V, Si IV, and Ly$α$ transitions, a factor of $\\sim$2.4 more components than identified from lower resolution spectra. We detect fourteen distinct LL pairs across three ionic species, forming one of the largest line-locking webs known to date: three Si IV pairs connecting components (2, 10), (4, 11), and (5, 12); six N V pairs organized into four groups; and five C IV pairs organized into three groups. Monte Carlo simulations show that the probability of this twelve-component LL web arising by chance is $< 10^{-5}$. Photoionization modeling with Cloudy yields ionization parameters of $\\log U \\approx -2.4$ to $-0.6$ and total hydrogen column densities of $\\log N({\\rm H}) \\approx 18.4$-$20.6$ for the twelve components. A comparison of the properties of shadowed and shadowing clouds shows that ion column densities and ionization parameters typically agree within a factor of $\\sim$3, broadly supporting the standard radiative acceleration picture, although several outliers suggest that multi-ion locking and cloud-cloud interactions may also regulate LL stability. These results demonstrate that medium- and high-resolution spectroscopy is essential for resolving the full complexity of line-locked quasar outflows.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.41427",
  "author_total": 4,
  "authors": [
    {
      "name": "Chen Chen"
    },
    {
      "name": "Wei-Jian Lu"
    },
    {
      "name": "Ying-Ru Lin"
    },
    {
      "name": "Bo Ma"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9e5zeg4k1rxka.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.41427",
  "fulltext_url": null,
  "id": "9e5zeg4k1rxka",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.41427",
  "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/2610.41427",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/9e5zeg4k1rxka.ris",
  "sources": [
    {
      "first_seen": "2026-11-02T12:21:15Z",
      "native_id": "2610.41427",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.41427"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "Resolving the Complex Line-Locking Structure in Quasar J004613+010425 with VLT/X-shooter Spectroscopy",
  "title_text": "Resolving the Complex Line-Locking Structure in Quasar J004613+010425 with VLT/X-shooter Spectroscopy",
  "type": "preprint",
  "updated_at": "2026-11-04T15:20:51Z",
  "url": "https://research.draconitic.com/paper/9e5zeg4k1rxka",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1051/0004-6361/202662070",
      "pid": "1pxbcw8akd6az",
      "relation": "published-as",
      "title": "Resolving the complex line-locking structure in quasar J004613+010425 with VLT/X-shooter spectroscopy",
      "venue": "Astronomy & Astrophysics"
    }
  ]
}