Anisotropies and non-Gaussianity of the cosmological gravitational wave background

@article{Bartolo2019AnisotropiesAN,
  title={Anisotropies and non-Gaussianity of the cosmological gravitational wave background},
  author={Nicola Bartolo and Daniele Bertacca and Sabino Matarrese and Marco Peloso and Angelo Ricciardone and Antonio Walter Riotto and Gianmassimo Tasinato},
  journal={Physical Review D},
  year={2019}
}
The Stochastic Gravitational Wave Background (SGWB) is expected to be a key observable for Gravitational Wave (GW) interferometry. Its detection will open a new window on early universe cosmology and on the astrophysics of compact objects. Using a Boltzmann approach, we study the angular anisotropies of the GW energy density, which is an important tool to disentangle the different cosmological and astrophysical contributions to the SGWB. Anisotropies in the cosmological background are imprinted… 

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References

SHOWING 1-10 OF 60 REFERENCES

Probing non-Gaussian stochastic gravitational wave backgrounds with LISA

The stochastic gravitational wave background (SGWB) contains a wealth of information on astrophysical and cosmological processes. A major challenge of upcoming years will be to extract the

Anisotropy of the astrophysical gravitational wave background: Analytic expression of the angular power spectrum and correlation with cosmological observations

Unresolved and resolved sources of gravitational waves are at the origin of a stochastic gravitational wave background. While the computation of its mean density as a function of frequency in a

Polarization of a stochastic gravitational wave background through diffusion by massive structures

The geometric optics approximation traditionally used to study the propagation of gravitational waves on a curved background, breaks down in the vicinity of compact and extended astrophysical

Gravitational waves from inflation

The production of a stochastic background of gravitational waves is a fundamental prediction of any cosmological inflationary model. The features of such a signal encode unique information about the

Cosmological backgrounds of gravitational waves

Gravitational waves (GWs) have a great potential to probe cosmology. We review early universe sources that can lead to cosmological backgrounds of GWs. We begin by presenting proper definitions of

Non-Gaussianity from inflation: theory and observations

Anisotropies in the stochastic gravitational-wave background: Formalism and the cosmic string case

We develop a powerful analytical formalism for calculating the energy density of the stochastic gravitational wave background, including a full description of its anisotropies. This is completely

Photon-graviton scattering: A new way to detect anisotropic gravitational waves?

Gravitons are the quantum counterparts of gravitational waves in low-energy theories of gravity. Using Feynman rules one can compute scattering amplitudes describing the interaction between gravitons

Anisotropic tensor power spectrum at interferometer scales induced by tensor squeezed non-Gaussianity

We develop a scenario of inflation with spontaneously broken time and space diffeomorphisms, with distinctive features for the primordial tensor modes. Inflationary tensor fluctuations are not
...