{
  "abstract": "We use ¹² CO ( J = 1–0) data from the MWISP survey to investigate turbulence in a ∼kiloparsec-scale segment of the Local Arm. By slicing the position–position–velocity cube into narrow layers that follow the Galactic-rotation trend in the L – V diagram, we find that the structure functions (SFs) and spatial power spectra (SPS) of the ¹² CO ( J = 1–0) line velocity and intensity exhibit consistent scaling behaviors across all layers, demonstrating that the molecular gas forms a single, coherent turbulent field with energy cascading from ∼200 pc down to parsec scales. The SPS power-law slopes of both the intensity and velocity fields approach the values expected from turbulence models. Cloud-to-cloud velocity SFs based on the molecular clouds located in the region follow the same extended self-similarity scaling (ESS) as the pixel-based statistics, indicating that intercloud motions are part of the same large-scale turbulent cascade. Together, these results provide direct observational evidence that molecular clouds are not dynamically isolated entities but are embedded within a larger-scale turbulent flow that links galactic dynamics to star formation on cloud scales.",
  "abstract_shown": true,
  "affiliations": [
    "Chinese Academy of Sciences",
    "University of Science and Technology of China"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Yuehui Ma",
      "orcid": "0000-0002-8051-5228"
    },
    {
      "affs": [
        0
      ],
      "name": "Miaomiao Zhang",
      "orcid": "0000-0002-6388-649X"
    },
    {
      "affs": [
        0
      ],
      "name": "Hongchi Wang",
      "orcid": "0000-0003-0746-7968"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Xuepeng Chen",
      "orcid": "0000-0003-3151-8964"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Zhenyi Yue",
      "orcid": "0009-0009-3431-1150"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Suziye He",
      "orcid": "0009-0004-2947-4020"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Xiangyu Ou",
      "orcid": "0009-0009-8707-8620"
    },
    {
      "affs": [
        0
      ],
      "name": "Li Sun",
      "orcid": "0000-0003-2732-0592"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4wv1zsd0w8dde.bib",
  "cited_by": 0,
  "doi": "10.3847/1538-4357/aea610",
  "fulltext_url": null,
  "id": "4wv1zsd0w8dde",
  "issns": [
    "0004-637X",
    "1538-4357"
  ],
  "landing_url": "https://iopscience.iop.org/article/10.3847/1538-4357/aea610",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3103|Astrophysics and Star Formation Studies"
    ]
  ],
  "openalex": "W4416468987",
  "pdf_url": "https://iopscience.iop.org/article/10.3847/1538-4357/aea610/pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-19",
  "publisher": "American Astronomical Society",
  "ris": "https://research.draconitic.com/paper/4wv1zsd0w8dde.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:11Z",
      "native_id": "10.3847/1538-4357/aea610",
      "source": "crossref",
      "url": "https://iopscience.iop.org/article/10.3847/1538-4357/aea610"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Astrophysics and Star Formation Studies",
      "subfield": "stellar"
    }
  ],
  "title": "Examining Turbulence in Galactic Molecular Clouds. II. Turbulence Cascade Beyond the Scale of Giant Molecular Clouds",
  "title_text": "Examining Turbulence in Galactic Molecular Clouds. II. Turbulence Cascade Beyond the Scale of Giant Molecular Clouds",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:11Z",
  "url": "https://research.draconitic.com/paper/4wv1zsd0w8dde",
  "venue": "The Astrophysical Journal",
  "versions": []
}