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      Spikes and matter inhomogeneities in massless scalar field models

      Coley, A.A.; Lim, Woei Chet
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      scalar10arxiv.pdf
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      DOI
       10.1088/0264-9381/33/1/015009
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      Coley, A. A., & Lim, W. C. (2016). Spikes and matter inhomogeneities in massless scalar field models. Classical and Quantum Gravity, 33(1). http://doi.org/10.1088/0264-9381/33/1/015009
      Permanent Research Commons link: https://hdl.handle.net/10289/10202
      Abstract
      We shall discuss the general relativistic generation of spikes in a massless scalar field or stiff perfect fluid model. We first investigate orthogonally transitive (OT) G 2 stiff fluid spike models both heuristically and numerically, and give a new exact OT G 2 stiff fluid spike solution. We then present a new two-parameter family of non-OT G 2 stiff fluid spike solutions, obtained by the generalization of non-OT G 2 vacuum spike solutions to the stiff fluid case by applying Geroch's transformation on a Jacobs seed. The dynamics of these new stiff fluid spike solutions is qualitatively different from that of the vacuum spike solutions in that the matter (stiff fluid) feels the spike directly and the stiff fluid spike solution can end up with a permanent spike. We then derive the evolution equations of non-OT G 2 stiff fluid models, including a second perfect fluid, in full generality, and briefly discuss some of their qualitative properties and their potential numerical analysis. Finally, we discuss how a fluid, and especially a stiff fluid or massless scalar field, affects the physics of the generation of spikes.
      Date
      2016-01-07
      Type
      Journal Article
      Publisher
      IOP Publishing LTD
      Rights
      This is an author’s accepted version of an article published in the journal: Classical and Quantum Gravity. © 2016 IOP Publishing Ltd.
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      • Computing and Mathematical Sciences Papers [1455]
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