{
  "abstract": "Recent observations suggest that accretion streamers are common in protoplanetary disks, yet their dynamical impact on disk evolution remains poorly understood. Using three-dimensional hydrodynamic simulations with mass infall rates of $10^{-8}$--$10^{-6} \\ M_{\\odot}\\ \\mathrm{yr}^{-1}$, we investigate how streamer accretion influences the structure and evolution of protoplanetary disks. We find that a prograde streamer can excite disk eccentricity globally to values as high as $\\sim0.4$. The resulting eccentric disk develops prominent spiral arms and crescent-shaped overdensities whose spatial structures agree remarkably well with analytic eccentric-disk theory. It also undergoes significant warping, and exhibits enhanced and variable stellar accretion. In contrast, retrograde streamer accretion efficiently removes disk angular momentum, producing a compact disk and, in extreme cases, triggering disk breaking. Using synthetic ALMA molecular-line observations, we show that streamer-driven perturbations generate observable kinematic signatures, including Doppler flips in moment maps and wiggles in position--velocity diagrams. Remarkably, these signatures can persist for up to $100\\ \\mathrm{kyr}$ after infall has ceased, suggesting that some kinematic disturbances observed in disks without currently detected streamers may be relics of past infall events. Finally, we discuss the implications of streamer-driven disk evolution for planet formation and planet--disk interactions.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.34107",
  "author_total": 4,
  "authors": [
    {
      "name": "Han-Gyeol Yun"
    },
    {
      "name": "Jeong-Eun Lee"
    },
    {
      "name": "Jaehan Bae"
    },
    {
      "name": "Woong-Tae Kim"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4ayw2y9da3qzz.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.34107",
  "fulltext_url": null,
  "id": "4ayw2y9da3qzz",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.34107",
  "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.EP"
    ],
    [
      "arxiv",
      "astro-ph.SR"
    ],
    [
      "openalex",
      "3103|Astrophysics and Star Formation Studies"
    ]
  ],
  "openalex": "W7214786589",
  "pdf_url": "https://arxiv.org/pdf/2609.34107",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4ayw2y9da3qzz.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:12Z",
      "native_id": "2609.34107",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.34107"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.EP",
      "subfield": "planetary"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "Dynamical Impacts of Accretion Streamers on Protoplanetary Disks",
  "title_text": "Dynamical Impacts of Accretion Streamers on Protoplanetary Disks",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:12Z",
  "url": "https://research.draconitic.com/paper/4ayw2y9da3qzz",
  "venue": "arXiv",
  "versions": []
}