{
  "id": "2301.13651",
  "version": "v1",
  "published": "2023-01-31T14:09:04.000Z",
  "updated": "2023-01-31T14:09:04.000Z",
  "title": "Radio Study of the Pulsar Wind Nebula Powered by PSR B1706-44",
  "authors": [
    "Y. H. Liu",
    "C. -Y. Ng",
    "R. Dodson"
  ],
  "comment": "16 pages, 9 figures, accepted by APJ",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "PSR B1706$-$44 is an energetic gamma-ray pulsar located inside supernova remnant (SNR) G343.1$-$2.3 and it powers a compact pulsar wind nebula (PWN) that shows torus and jet structure in X-rays. We present a radio study of the PWN using Australia Telescope Compact Array (ATCA) observations at 3, 6, 13, and 21\\,cm. We found an overall arc-like morphology at 3 and 6\\,cm, and the ``arc\" shows two distinct peaks at 6\\,cm. The radio emission is faint inside the X-ray PWN and only brightens beyond that. We develop a thick torus model with Doppler boosting effect to explain the radio PWN structure. The model suggests a bulk flow speed of $\\sim 0.2c$, which could indicate significant deceleration of the flow from the X-ray emitting region. Our polarization result reveals a highly ordered toroidal $B$-field in the PWN. Its origin is unclear given that the supernova reverse shock should have interacted with the PWN. At a larger scale, the 13 and 21\\,cm radio images detected a semi-circular rim and an east-west ridge of G343.1$-$2.3. We argue that the latter could possibly be a pulsar tail rather than a filament of the SNR, as supported by the flat radio spectrum and the alignment between the magnetic field and its elongation.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2023-01-31T14:09:04.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "pulsar wind nebula",
      "radio study",
      "pulsar located inside supernova remnant",
      "gamma-ray pulsar located inside supernova",
      "australia telescope compact array"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 16,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}