{
  "id": "2406.00903",
  "version": "v1",
  "published": "2024-06-03T00:04:59.000Z",
  "updated": "2024-06-03T00:04:59.000Z",
  "title": "Revisiting Gamma-Ray Emission of the Supernova Remnant RCW 103",
  "authors": [
    "Yi Xing",
    "Zhongxiang Wang",
    "Dong Zheng"
  ],
  "comment": "7 pages, 4 figures, 2 tables, submitted to ApJ",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "We analyze more than 15 years of the \\gr\\ data, obtained with the Large Area Telescope (LAT) onboard {\\it the Fermi Gamma-ray Space Telescope (Fermi)}, for the region of the young supernova remnant (SNR) RCW~103, since the nearby source 4FGL J1616.2$-$5054e, counterpart to HESS~J1616$-$518 and $\\simeq$13\\,arcmin away from the SNR, is determined to be extended in the more recent Fermi-LAT source catalog. Different templates for 4FGL J1616.2$-$5054e and RCW~103 are tested, and we find that a point source with a power-law (PL) spectrum at the southern limb of the SNR best describes the detected gamma-ray emission. The photon index of the PL emission is $\\Gamma\\simeq 2.31$, softer than the previously reported $\\Gamma\\simeq 2.0$ when the counterpart to HESS~J1616$-$518 was considered to be a point source (which likely caused mis-identification of extended emission at RCW~103). In order to produce the \\gr\\ emission in a hadronic scenario, we estimate that protons with an index$\\sim$2.4 PL energy distribution are needed. These results fit with those from multi-wavelength observations that have indicated the remnant at the southern limb is interacting with a molecular cloud.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-06-03T00:04:59.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "supernova remnant rcw",
      "revisiting gamma-ray emission",
      "fermi gamma-ray space telescope",
      "nearby source 4fgl j1616",
      "point source"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}