Gravitational waves from cosmological phase transitions

Details Gravitational waves from cosmological phase transitions Gravitational waves from cosmological phase transitions

2010-02-08

arxiv.org/abs/1002.1389v1

2010 J. Phys.: Conf. Ser. 222 012021

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

14 pages, 8 Figures Proceedeings of the 1st Mediterranean Conference on Classical and Quantum Gravity (MCCQG)

Scientific paper

10.1088/1742-6596/222/1/012021

I discuss the generation of a stochastic background of gravitational waves during a first order phase transition. I present simple general arguments which explain the main features of the gravitational wave spectrum like the $k^3$ power law growth on large scales and a estimate for the peak amplitude. In the second part I concentrate on the electroweak phase transition and argue that the nucleosynthesis bound on its gravitational wave background seriously limits seed magnetic fields which may have been generated during this transition.

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