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Gravitational waves from bubble walls

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arxiv 2108.05510 v2 pith:3TGLDFYP submitted 2021-08-12 astro-ph.CO gr-qchep-ph

Ariel Megevand , Federico Agustin Membiela This is my paper · ORCID
classification astro-ph.COgr-qchep-ph
keywords bubblegravitationalcollisiondeformationsgeneralmechanismmethodmodel
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We present a general method for computing the gravitational radiation arising from the motion of bubble walls or thin fluid shells in cosmological phase transitions. We discuss the application of this method to different wall kinematics. In particular, we derive general expressions for the bubble collision mechanism in the envelope approximation and the so-called bulk flow model, and we also consider deformations from the spherical bubble shape. We calculate the gravitational wave spectrum for a specific model of deformations on a definite size scale, which gives a peak away from that of the bubble collision mechanism.

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  1. Thin and thick bubble walls III: wall energy

    gr-qc 2025-01 conditional novelty 6.0 of 10

    The wall energy-momentum tensor is computed to next-to-next-to-leading order in the wall width, with a decomposition that assigns the potential barrier to the wall.

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