Black holes with polyhedral multi-string configurations

Citation
V. Frolov et D. Fursaev, Black holes with polyhedral multi-string configurations, CLASS QUANT, 18(8), 2001, pp. 1535-1541
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
CLASSICAL AND QUANTUM GRAVITY
ISSN journal
0264-9381 → ACNP
Volume
18
Issue
8
Year of publication
2001
Pages
1535 - 1541
Database
ISI
SICI code
0264-9381(20010421)18:8<1535:BHWPMC>2.0.ZU;2-R
Abstract
We find exact solutions of the Einstein equations which describe a black ho le pierced by infinitely thin cosmic strings. The string segments enter the black hole along the radii and their positions coincide with the symmetry axes of a regular polyhedron. Each string produces an angle deficit proport ional to its tension, while the metric outside the strings is locally a Sch warzschild one, There are three configurations corresponding to tetrahedra, octahedra and icosahedra where the number of string segments is 14, 26 and 62, respectively. There is also a 'double-pyramid' configuration where the number of string segments is not fixed. There can be two or three independ ent types of strings in one configuration. Tensions of strings belonging to the same type must be equal. Analogous polyhedral multi-string configurati ons can be combined with other spherically symmetric solutions of the Einst ein equations.