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Gravitational waves from asymmetric oscillon dynamics?

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arxiv 1803.08047 v2 pith:4M334VNH submitted 2018-03-21 astro-ph.CO

Gravitational waves from asymmetric oscillon dynamics?

Mustafa A. Amin , Jonathan Braden , Edmund J. Copeland , John T. Giblin Jr , Christian Solorio , Zachary J. Weiner , Shuang-Yong Zhou This is my paper
classification astro-ph.CO
keywords gravitationalnumericalwavesasymmetricdynamicsoscillonscenariossignals
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It has been recently suggested that oscillons produced in the early universe from certain asymmetric potentials continue to emit gravitational waves for a number of $e$-folds of expansion after their formation, leading to potentially detectable gravitational wave signals. We revisit this claim by conducting a convergence study using graphics processing unit (GPU)-accelerated lattice simulations and show that numerical errors accumulated with time are significant in low-resolution scenarios, or in scenarios where the run-time causes the resolution to drop below the relevant scales in the problem. Our study determines that the dominant, growing high frequency peak of the gravitational wave signals in the fiducial "hill-top model" in [arXiv:1607.01314] is a numerical artifact. This finding prompts the need for a more careful analysis of the numerical validity of other similar results related to gravitational waves from oscillon dynamics.

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Cited by 4 Pith papers

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