DC Field | Value | Language |
---|---|---|
dc.contributor.author | Hwang, Dong-Il | ko |
dc.contributor.author | Yeom, Dong-Han | ko |
dc.date.accessioned | 2013-03-08T22:38:15Z | - |
dc.date.available | 2013-03-08T22:38:15Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2010 | - |
dc.identifier.citation | CLASSICAL AND QUANTUM GRAVITY, v.27, no.20 | - |
dc.identifier.issn | 0264-9381 | - |
dc.identifier.uri | http://hdl.handle.net/10203/94531 | - |
dc.description.abstract | We study responses of the Brans-Dicke field due to gravitational collapses of scalar field pulses using numerical simulations. Double-null formalism is employed to implement the numerical simulations. If we supply a scalar field pulse, it will asymptotically form a black hole via dynamical interactions of the Brans-Dicke field. Hence, we can observe the responses of the Brans-Dicke field by two different regions. First, we observe the late time behaviors after the gravitational collapse, which include formations of a singularity and an apparent horizon. Second, we observe the fully dynamical behaviors during the gravitational collapse and view the energy-momentum tensor components. For the late time behaviors, if the Brans-Dicke coupling is greater (or smaller) than -1.5, the Brans-Dicke field decreases (or increases) during the gravitational collapse. Since the Brans-Dicke field should be relaxed to the asymptotic value with the elapse of time, the final apparent horizon becomes time-like (or space-like). For the dynamical behaviors, we observed the energy-momentum tensors around omega similar to -1.5. If the Brans-Dicke coupling is greater than -1.5, the T-uu component can be negative at the outside of the black hole. This can allow an instantaneous inflating region during the gravitational collapse. If the Brans-Dicke coupling is less than -1.5, the oscillation of the T-vv component allows the apparent horizon to shrink. This allows a combination that violates weak cosmic censorship. Finally, we discuss the implications of the violation of the null energy condition and weak cosmic censorship. | - |
dc.language | English | - |
dc.publisher | IOP PUBLISHING LTD | - |
dc.subject | BLACK-HOLE EVAPORATION | - |
dc.subject | MASSLESS SCALAR FIELD | - |
dc.subject | GENERAL-RELATIVITY | - |
dc.title | Responses of the Brans-Dicke field due to gravitational collapses | - |
dc.type | Article | - |
dc.identifier.wosid | 000282094900003 | - |
dc.identifier.scopusid | 2-s2.0-78649585701 | - |
dc.type.rims | ART | - |
dc.citation.volume | 27 | - |
dc.citation.issue | 20 | - |
dc.citation.publicationname | CLASSICAL AND QUANTUM GRAVITY | - |
dc.identifier.doi | 10.1088/0264-9381/27/20/205002 | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | BLACK-HOLE EVAPORATION | - |
dc.subject.keywordPlus | MASSLESS SCALAR FIELD | - |
dc.subject.keywordPlus | GENERAL-RELATIVITY | - |
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