{
  "abstract": "We present a multi-epoch, primarily X-ray study of the narrow-line Seyfert 1 (NLSy1) galaxy Mrk~766 by combining archival \\textit{XMM-Newton} observations spanning nearly two decades together with a \\textit{XRISM} observation obtained during its Performance Verification Phase. We analyzed the absorption and emission features in the soft X-ray spectra from RGS and EPIC-pn data, revealing a stratified multi-phase potentially ionised absorber with a column density varying at a timescale of $\\sim$1 day. The covering fraction shows positive correlation with the continuum flux, however with significant intrinsic scatter, between the epochs. Mrk~766 exhibits a multi-component Fe\\,K$α$ emission line as revealed by fits to the \\textit{XRISM} data. A quasi-phenomenological model comprising a torus and a broad \\textit{diskline} component distinguishes the two components and constrains the inner radius of the potential broad line emitting disk substructure between $R_{in}=40-60\\,r_{\\rm g}$. Analysis of multiple epochs of the Fe K$α$ complex across \\textit{XMM-Newton} observations reveals that the broad component tracks the continuum flux closely and effectively reflects the trend with respect to the continuum. The narrow component is consistent with a distant emitter, potentially the torus. Quasi-simultaneous monitoring with \\textit{Swift}-XRT and UVOT further indicates UV emission lagging the X-rays by $5.9^{+4.1}_{-5.7}$ hours, consistent with disk reprocessing of coronal X-ray fluctuations, and corresponds to a light travel distance of up to $10^{3}\\,r_{\\rm g}$. Overall, our analysis maps the extent of the dynamically evolving absorber, the iron line emitter, and the accretion disk in this highly accreting NLSy1 system.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.16151",
  "author_total": 4,
  "authors": [
    {
      "name": "Ayon Mondal"
    },
    {
      "name": "Tathagata Saha"
    },
    {
      "name": "Arijit Sar"
    },
    {
      "name": "Ritaban Chatterjee"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0kvf0178gjnwe.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.16151",
  "fulltext_url": null,
  "id": "0kvf0178gjnwe",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.16151",
  "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.HE"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.16151",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-14",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0kvf0178gjnwe.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:19Z",
      "native_id": "2609.16151",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.16151"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    }
  ],
  "title": "Dynamic Accretion Disk-Corona Connection and Broad Fe K$α$ Variability in Mrk 766 Revealed by Time-Resolved High Resolution X-Ray Spectroscopic Analysis",
  "title_text": "Dynamic Accretion Disk-Corona Connection and Broad Fe Kα Variability in Mrk 766 Revealed by Time-Resolved High Resolution X-Ray Spectroscopic Analysis",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:19Z",
  "url": "https://research.draconitic.com/paper/0kvf0178gjnwe",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.3847/1538-4357/aea83d",
      "pid": "0bc3ewtdb4ne2",
      "relation": "published-as",
      "title": "Dynamic Accretion Disk–Corona Connection and Broad Fe K α Variability in Mrk 766 Revealed by Time-resolved High-resolution X-Ray Spectroscopic Analysis",
      "venue": "The Astrophysical Journal"
    }
  ]
}