論文

査読有り
2007年1月

Relativistic gravitational collapse of a cylindrical shell of dust

PROGRESS OF THEORETICAL PHYSICS
  • Ken-ichi Nakao
  • ,
  • Yasunari Kurita
  • ,
  • Yoshiyuki Morisawa
  • ,
  • Tomohiro Harada

117
1
開始ページ
75
終了ページ
102
記述言語
英語
掲載種別
研究論文(学術雑誌)
出版者・発行元
PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE

The gravitational collapse of a thick cylindrical shell of dust matter is investigated. It is found that a spacetime singularity forms on the symmetry axis and that it is necessarily naked, i.e., observable in principle. We propose a physically reasonable boundary condition at this naked singularity to construct the solution including its causal future. This boundary condition enables us to construct the unique continuation of spacetime beyond the naked singularity and ensures that the dust shell passes through the naked singularity. When the cylindrical shell leaves its symmetry axis away, the naked singularity disappears, and regularity is recovered. We construct numerical solutions with this feature. This result implies that the gravity produced by a thick cylindrical shell of dust is too weak to bind the shell even if it engenders the formation of a curvature singularity which is so strong as to satisfy the limiting focusing condition. For this reason, this naked singularity is very weak in the extended spacetime; the metric tensor is C1- even at the naked singularity, and the extended spacetime is complete for almost all geodesics. This feature is also seen for singular hypersurfaces. Such an extended spacetime can be regarded as phenomenological in the sense that it is valid if the relevant microphysics length scale is sufficiently small compared to the scale of interest.


リンク情報
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000244129200003&DestApp=WOS_CPL
ID情報
  • ISSN : 0033-068X
  • Web of Science ID : WOS:000244129200003

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