{
  "id": "1509.00404",
  "version": "v1",
  "published": "2015-08-31T07:47:51.000Z",
  "updated": "2015-08-31T07:47:51.000Z",
  "title": "Broadband extended emission in gravitational waves from core-collapse supernovae",
  "authors": [
    "Amir Levinson",
    "Maurice H. P. M. van Putten",
    "Guy Pick"
  ],
  "comment": "to appear in ApJ",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "Black holes in core-collapse of massive stars are expected to surge in mass and angular momentum by hyper-accretion immediately following their formation. We here describe a general framework of extended emission in gravitational waves from non-axisymmetric accretion flows from fallback matter of the progenitor envelope. It shows (a) a maximum efficiency in conversion of accretion energy into gravitational waves at hyper-accretion rates exceeding a critical value set by the ratio of the quadrupole mass inhomogeneity and viscosity with (b) a peak characteristic strain amplitude at the frequency $f_b=\\Omega_b/\\pi$, where $\\Omega_b$ is the Keplerian angular velocity at which viscous torques equal angular momentum loss in gravitational radiation, with $h_{char}\\propto f^{1/6}$ at $f<f_b$ and $h_{char}\\propto f^{-1/6}$ at $f>f_b$. Upcoming gravitational wave observations may probe this scaling by extracting broadband spectra using time-sliced matched filtering with chirp templates, recently developed for identifying turbulence in noisy time series.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-08-31T07:47:51.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "gravitational wave",
      "broadband extended emission",
      "core-collapse supernovae",
      "torques equal angular momentum loss",
      "viscous torques equal angular momentum"
    ],
    "publication": {
      "doi": "10.1088/0004-637X/812/2/124"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1391289
    }
  }
}