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The stochastic gravitational wave background from turbulence and magnetic fields generated by a first-order phase transition
Chiara Caprini, Ruth Durrer, Geraldine Servant
We analytically derive the spectrum of gravitational waves due to magneto-hydrodynamical turbulence generated by bubble collisions in a first-order phase transition. In contrast to…
Can the observed large scale magnetic fields be seeded by helical primordial fields?
Chiara Caprini, Ruth Durrer, Elisa Fenu
Gravitational wave production induces a strong constraint on the amplitude of a primordial magnetic field. It has been shown that the nucleosynthesis bound for a stochastic gravita…
The cosmic microwave background temperature bispectrum from scalar perturbations induced by primordial magnetic fields
Chiara Caprini, Fabio Finelli, Daniela Paoletti +1
We evaluate the angular bispectrum of the CMB temperature anisotropy at large angular scale due to a stochastic background of primordial magnetic fields. The shape of non-Gaussiani…
General Properties of the Gravitational Wave Spectrum from Phase Transitions
Chiara Caprini, Ruth Durrer, Thomas Konstandin +1
In this paper we discuss some general aspects of the gravitational wave background arising from post-inflationary short-lasting cosmological events such as phase transitions. We co…