{
  "id": "2412.19701",
  "version": "v1",
  "published": "2024-12-27T15:53:45.000Z",
  "updated": "2024-12-27T15:53:45.000Z",
  "title": "Magnetic fields on different spatial scales of the L328 cloud",
  "authors": [
    "Shivani Gupta",
    "Archana Soam",
    "Janik Karoly",
    "Chang Won Lee",
    "Maheswar G"
  ],
  "comment": "14 pages, 7 figures, 4 tables. Accepted for publication in MNRAS",
  "categories": [
    "astro-ph.GA",
    "astro-ph.SR"
  ],
  "abstract": "L328 core has three sub-cores S1, S2, and S3, among which the sub-core S2 contains L328-IRS, a Very Low Luminosity Object (VeLLO), which shows a CO bipolar outflow. Earlier investigations of L328 mapped cloud/envelope (parsec-scale) magnetic fields (B-fields). In this work, we used JCMT/POL-2 submillimeter (sub-mm) polarisation measurements at 850 $\\mu$m to map core-scale B-fields in L328. The B-fields were found to be ordered and well-connected from cloud to core-scales, i.e., from parsec- to sub-parsec-scale. The connection in B-field geometry is shown using $Planck$ dust polarisation maps to trace large-scale B-fields, optical and near-infrared (NIR) polarisation observations to trace B-fields in the cloud and envelope, and 850 $\\mu$m polarisation mapping core-scale field geometry. The core-scale B-field strength, estimated using the modified Davis-Chandrasekhar-Fermi relation, was found to be 50.5 $\\pm$ 9.8 $\\mu$G, which is $\\sim$2.5 times higher than the envelope B-field strength found in previous studies. This indicates that B-fields are getting stronger on smaller (sub-parsec) scales. The mass-to-flux ratio of 1.1 $\\pm$ 0.2 suggests that the core is magnetically transcritical. The energy budget in the L328 core was also estimated, revealing that the gravitational, magnetic, and non-thermal kinetic energies were comparable with each other, while thermal energy was significantly lower.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-12-27T15:53:45.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "magnetic fields",
      "l328 cloud",
      "spatial scales",
      "l328 core",
      "b-field strength"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 14,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}