Work

Gravitational waves from bubble walls

Year: 2021

Type: article

Abstract: 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.

Source: Journal of Cosmology and Astroparticle Physics

DOI: 10.1088/1475-7516/2021/10/073

Authors: Ariel Mégevand, Federico Agustín Membiela

Institutions: Consejo Nacional de Investigaciones Científicas y Técnicas, National University of Mar del Plata, Instituto de Investigaciones Físicas de Mar del Plata

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Mar del Plata

Awards: G2943653314, G3458518131, G5932829767