Gravitational radiation from a bulk flow model
@article{Konstandin2017GravitationalRF, title={Gravitational radiation from a bulk flow model}, author={Thomas Konstandin}, journal={Journal of Cosmology and Astroparticle Physics}, year={2017}, volume={2018}, pages={047 - 047} }
We perform simulations in a simple model that aims to mimic the hydrodynamic evolution of a relativistic fluid during a cosmological first-order phase transitions. The observable we are concerned with is hereby the spectrum of gravitational radiation produced by colliding fluid shells. We present simple parameterizations of our results as functions of the wall velocity, the duration of the phase transition and the latent heat. We also improve on previous results in the envelope approximation…
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References
SHOWING 1-10 OF 18 REFERENCES
Gravitational waves from the sound of a first order phase transition.
- PhysicsPhysical review letters
- 2014
It is found that the compression waves in the fluid continue to be a source of GWs long after the bubbles have merged, a new effect not taken properly into account in previous modeling of the GW source.
Numerical simulations of acoustically generated gravitational waves at a first order phase transition
- Physics
- 2015
We present details of numerical simulations of the gravitational radiation produced by a first order thermal phase transition in the early universe. We confirm that the dominant source of…
Revisiting the envelope approximation: Gravitational waves from bubble collisions
- Physics
- 2016
We study the envelope approximation and its applicability to first-order phase transitions in the early universe. We demonstrate that the power laws seen in previous studies exist independently of…
General properties of the gravitational wave spectrum from phase transitions
- Physics
- 2009
In this paper we discuss some general aspects of the gravitational wave background arising from postinflationary short-lasting cosmological events such as phase transitions. We concentrate on the…
Gravitational waves from bubble dynamics: beyond the envelope
- PhysicsJournal of Cosmology and Astroparticle Physics
- 2019
We study gravitational-wave production from bubble dynamics (bubble collisions and sound waves) during a cosmic first-order phase transition with an analytic approach. We first propose modeling the…
Gravitational wave generation from bubble collisions in first-order phase transitions: An analytic approach
- Physics
- 2008
Gravitational wave production from bubble collisions was calculated in the early nineties using numerical simulations. In this paper, we present an alternative analytic estimate, relying on a…
Gravitational wave production by collisions: more bubbles
- Physics
- 2008
We re-examine the production of gravitational waves by bubble collisions during a first-order phase transition. The spectrum of the gravitational radiation is determined by numerical simulations…
Science with the space-based interferometer eLISA. II: gravitational waves from cosmological phase transitions
- Physics
- 2015
We investigate the potential for the eLISA space-based interferometer to detect the stochastic gravitational wave background produced by strong first-order cosmological phase transitions. We discuss…
Gravitational-Wave Constraints on the Neutron-Star-Matter Equation of State.
- PhysicsPhysical review letters
- 2018
It is concluded that the maximal radius of a 1.4-solar-mass neutron star is 13.6 km, and that the smallest allowed tidal deformability of a similar-mass star is Λ(1.4 M_{⊙})=120.4%.
Gravitational radiation from colliding vacuum bubbles: Envelope approximation to many-bubble collisions.
- PhysicsPhysical review. D, Particles and fields
- 1993
We introduce an approximation to calculate the gravitational radiation produced by the collision of true-vacuum bubbles that is simple enough to allow the simulation of a phase transition by the…