論文

査読有り
2008年1月11日

Self-similar cosmological solutions with dark energy. II. Black holes, naked singularities, and wormholes

Physical Review D - Particles, Fields, Gravitation and Cosmology
  • Hideki Maeda
  • ,
  • Tomohiro Harada
  • ,
  • B. J. Carr

77
2
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevD.77.024023

We use a combination of numerical and analytical methods, exploiting the equations derived in a preceding paper, to classify all spherically symmetric self-similar solutions which are asymptotically Friedmann at large distances and contain a perfect fluid with equation of state p=(γ-1)μ with 0&lt
γ&lt
2/3. The expansion of the Friedmann universe is accelerated in this case. We find a one-parameter family of self-similar solutions representing a black hole embedded in a Friedmann background. This suggests that, in contrast to the positive pressure case, black holes in a universe with dark energy can grow as fast as the Hubble horizon if they are not too large. There are also self-similar solutions which contain a central naked singularity with negative mass and solutions which represent a Friedmann universe connected to either another Friedmann universe or some other cosmological model. The latter are interpreted as self-similar cosmological white hole or wormhole solutions. The throats of these wormholes are defined as two-dimensional spheres with minimal area on a spacelike hypersurface and they are all nontraversable because of the absence of a past null infinity. © 2008 The American Physical Society.

リンク情報
DOI
https://doi.org/10.1103/PhysRevD.77.024023
ID情報
  • DOI : 10.1103/PhysRevD.77.024023
  • ISSN : 1550-7998
  • ISSN : 1550-2368
  • SCOPUS ID : 38049100382

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