Gravitational bremsstrahlung in plasmas and clusters

Abstract

We study the gravitational bremsstrahlung owing to collisions mediated by a $1/r$ potential. We combine classical and first order Born approximation results in order to construct an approximate gravitational `Gaunt factor' for the total emitted energy. We also obtain the cross-section with an angular momentum cut-off, and hence the cross-section for emission via close hyperbolic encounters in a gravitating cluster. These effects are the dominant source of very high frequency gravitational noise in the solar system. The total gravitational wave power of the Sun is $76\pm 20$MW.

arXiv comment12 pages 4 figures

References in corpus (18)

• Gravitational Wave Experiments and Early Universe Cosmology
• Gravitational waves from scattering of stellar-mass black holes in galactic nuclei
• Amplitudes, Observables, and Classical Scattering
• An Upper Limit on the Stochastic Gravitational-Wave Background of Cosmological Origin
• A new Generation of Standard Solar Models
• Challenges and Opportunities of Gravitational Wave Searches at MHz to GHz Frequencies
• Lower bound on the primordial black hole merger rate
• Gravitational Bremsstrahlung from Reverse Unitarity
• Gravitational wave energy emission and detection rates of Primordial Black Hole hyperbolic encounters
• Gravitational wave energy spectrum of hyperbolic encounters
• Gravitational waves from hyperbolic encounters
• The stochastic gravitational wave background from close hyperbolic encounters of primordial black holes in dense clusters
• Self-force correction to the deflection angle in black-hole scattering: a scalar charge toy model
• Detection regimes of the cosmological gravitational wave background from astrophysical sources
• A note on the gravitational wave energy spectrum of parabolic and hyperbolic encounters
• The Role of Baryon Structure in Neutron Stars
• Soft Bremsstrahlung
• Matter-wave coherence limit owing to cosmic gravitational wave background