{
  "id": "1808.01435",
  "version": "v1",
  "published": "2018-08-04T06:42:01.000Z",
  "updated": "2018-08-04T06:42:01.000Z",
  "title": "X-Ray Luminosity and Size Relationship of Supernova Remnants in the LMC",
  "authors": [
    "Po-Sheng Ou",
    "You-Hua Chu",
    "Pierre Maggi",
    "Chuan-Jui Li",
    "Un Pang Chang",
    "Robert A. Gruendl"
  ],
  "comment": "Accepted for publication in the ApJ",
  "categories": [
    "astro-ph.HE",
    "astro-ph.GA"
  ],
  "abstract": "The Large Magellanic Cloud (LMC) has $\\sim$60 confirmed supernova remnants (SNRs). Because of the known distance, 50 kpc, the SNRs' angular sizes can be converted to linear sizes, and their X-ray observations can be used to assess X-ray luminosities ($L_X$). We have critically examined the LMC SNRs' sizes reported in the literature to determine the most plausible sizes. These sizes and the $L_X$ determined from \\emph{XMM-Newton} observations are used to investigate their relationship in order to explore the environmental and evolutionary effects on the X-ray properties of SNRs. We find: (1) Small LMC SNRs, a few to 10 pc in size, are all of Type Ia with $L_X>10^{36}$ ergs s$^{-1}$. The scarcity of small core-collapse (CC) SNRs is a result of CCSNe exploding in the low-density interiors of interstellar bubbles blown by their massive progenitors during their main sequence phase. (2) Medium-sized (10-30 pc) CC SNRs show bifurcation in $L_X$, with the X-ray-bright SNRs either in an environment associated with molecular clouds or containing pulsars and pulsar wind nebulae and the X-ray-faint SNRs being located in low-density interstellar environments. (3) Large (size$>$30 pc) SNRs show a trend of $L_X$ fading with size, although the scatter is large. The observed relationship between $L_X$ and sizes can help constrain models of SNR evolution.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-08-04T06:42:01.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "x-ray luminosity",
      "supernova remnants",
      "size relationship",
      "assess x-ray luminosities",
      "large magellanic cloud"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}