Repulsive gravitational effects of global monopoles

A monopole formed as a consequence of the spontaneous breakdown of a global symmetry should have a mass that grows linearly with the distance off its core. It was recently shown by Barriola and Vilenkin that the gravitational effect of this configuration is equivalent to that of a deficit solid angl...

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Detalles Bibliográficos
Publicado: 1990
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v42_n8_p2626_Harari
http://hdl.handle.net/20.500.12110/paper_05562821_v42_n8_p2626_Harari
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_05562821_v42_n8_p2626_Harari
record_format dspace
spelling paper:paper_05562821_v42_n8_p2626_Harari2023-06-08T15:42:09Z Repulsive gravitational effects of global monopoles A monopole formed as a consequence of the spontaneous breakdown of a global symmetry should have a mass that grows linearly with the distance off its core. It was recently shown by Barriola and Vilenkin that the gravitational effect of this configuration is equivalent to that of a deficit solid angle in the metric, plus that of a relatively tiny mass at the origin. Here we show that this small effective mass is negative. Global monopoles thus share with other topological defects, such as domain walls and global strings, a repulsive gravitational potential. We solve numerically the coupled equations for the metric and the scalar field, to precisely determine this repulsive potential and in order to analyze the solution when gravitational effects are already significant close to the monopole core. We study the motion of test particles in a monopole background, and discuss the possible implications of a negative effective mass. © 1990 The American Physical Society. 1990 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v42_n8_p2626_Harari http://hdl.handle.net/20.500.12110/paper_05562821_v42_n8_p2626_Harari
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description A monopole formed as a consequence of the spontaneous breakdown of a global symmetry should have a mass that grows linearly with the distance off its core. It was recently shown by Barriola and Vilenkin that the gravitational effect of this configuration is equivalent to that of a deficit solid angle in the metric, plus that of a relatively tiny mass at the origin. Here we show that this small effective mass is negative. Global monopoles thus share with other topological defects, such as domain walls and global strings, a repulsive gravitational potential. We solve numerically the coupled equations for the metric and the scalar field, to precisely determine this repulsive potential and in order to analyze the solution when gravitational effects are already significant close to the monopole core. We study the motion of test particles in a monopole background, and discuss the possible implications of a negative effective mass. © 1990 The American Physical Society.
title Repulsive gravitational effects of global monopoles
spellingShingle Repulsive gravitational effects of global monopoles
title_short Repulsive gravitational effects of global monopoles
title_full Repulsive gravitational effects of global monopoles
title_fullStr Repulsive gravitational effects of global monopoles
title_full_unstemmed Repulsive gravitational effects of global monopoles
title_sort repulsive gravitational effects of global monopoles
publishDate 1990
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v42_n8_p2626_Harari
http://hdl.handle.net/20.500.12110/paper_05562821_v42_n8_p2626_Harari
_version_ 1768542508104548352

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