On the gauge dependence of gravitational waves generated at second order from scalar perturbations

30 Oct 2019 Tomikawa Keitaro Kobayashi Tsutomu

We revisit and clarify the gauge dependence of gravitational waves generated at second order from scalar perturbations. In a universe dominated by a perfect fluid with a constant equation-of-state parameter $w$, we compute the energy density of such induced gravitational waves in the Newtonian, comoving, and uniform curvature gauges... (read more)

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Categories


  • GENERAL RELATIVITY AND QUANTUM COSMOLOGY
  • COSMOLOGY AND NONGALACTIC ASTROPHYSICS