Geometry of massless cosmic strings

被引:15
作者
van de Meent, Maarten [1 ,2 ]
机构
[1] Univ Utrecht, Inst Theoret Phys, NL-3508 TD Utrecht, Netherlands
[2] Univ Utrecht, Spinoza Inst, NL-3508 TD Utrecht, Netherlands
来源
PHYSICAL REVIEW D | 2013年 / 87卷 / 02期
关键词
D O I
10.1103/PhysRevD.87.025020
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We study the geometry generated by a massless cosmic string. We find that this is given by a Riemann flat spacetime with a conical singularity along the world sheet of the string. The geometry of such a spacetime is completely fixed by the holonomy of a simple loop wrapping the conical singularity. In the case of a massless cosmic string, this holonomy is a null rotation or parabolic Lorentz transformation with a parabolic angle given by the linear energy density of the cosmic string. This description explicitly shows that there is no gravitational shockwave accompanying the massless cosmic string as has been suggested in the past. To illustrate the nonsingular nature of the surrounding geometry, we construct a metric for the massless cosmic string that is smooth everywhere outside the conical singularity. DOI: 10.1103/PhysRevD.87.025020
引用
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页数:8
相关论文
共 18 条
[1]  
[Anonymous], 2000, Cambridge Monographs on Mathematical Physics
[2]   Aichelburg-Sexl boost of domain walls and cosmic strings -: art. no. 025032 [J].
Barrabès, C ;
Hogan, PA ;
Israel, W .
PHYSICAL REVIEW D, 2002, 66 (02)
[3]   WMAP constraints on inflationary models with global defects [J].
Bevis, N ;
Hindmarsh, M ;
Kunz, M .
PHYSICAL REVIEW D, 2004, 70 (04)
[4]   COSMIC STRINGS [J].
HINDMARSH, MB ;
KIBBLE, TWB .
REPORTS ON PROGRESS IN PHYSICS, 1995, 58 (05) :477-562
[5]   How generic is cosmic string formation in supersymmetric grand unified theories [J].
Jeannerot, R ;
Rocher, J ;
Sakellariadou, M .
PHYSICAL REVIEW D, 2003, 68 (10)
[6]   TOPOLOGY OF COSMIC DOMAINS AND STRINGS [J].
KIBBLE, TWB .
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 1976, 9 (08) :1387-1398
[7]   Unconventional stringlike singularities in flat spacetime [J].
Krasnikov, S. .
PHYSICAL REVIEW D, 2007, 76 (02)
[8]   GRAVITATIONAL SHOCK-WAVES GENERATED BY EXTENDED SOURCES - ULTRARELATIVISTIC COSMIC STRINGS, MONOPOLES AND DOMAIN-WALLS [J].
LOUSTO, CO ;
SANCHEZ, N .
NUCLEAR PHYSICS B, 1991, 355 (01) :231-249
[9]  
POLCHINSKI J, ARXIVHEPTH0412244, P54011
[10]  
Sexl RU., 1971, Gen. Rel. Grav., V2, P303, DOI [DOI 10.1007/BF00758149, 10.1007/BF00758149]