Cosmic strings: Gravitation without local curvature
作者:
T. M. Helliwell,
D. A. Konkowski,
期刊:
American Journal of Physics
(AIP Available online 1987)
卷期:
Volume 55,
issue 5
页码: 401-407
ISSN:0002-9505
年代: 1987
DOI:10.1119/1.15145
出版商: American Association of Physics Teachers
关键词: SPACE−TIME;COSMOLOGICAL MODELS;GRAVITATION;UNIVERSE;GRAND UNIFIED THEORY;PHASE TRANSFORMATIONS;STRING MODELS;GENERAL RELATIVITY THEORY
数据来源: AIP
摘要:
Cosmic strings are very long, thin structures which might stretch over vast reaches of the universe. If they exist, they would have been formed during phase transitions in the very early universe. The space‐time surrounding a straight cosmic string is flat but nontrivial: A two‐dimensional spatial section is a cone rather than a plane. This feature leads to unique gravitational effects. The flatness of the cone means that many of the gravitational effects can be understood with no mathematics beyond trigonometry. This includes the observational predictions of the double imaging of quasars and the truncation of the images of galaxies.
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