ar X iv : 0 80 6 . 09 16 v 3 [ gr - q c ] 4 S ep 2 00 8 Phantom threat to cosmic censorship

نویسنده

  • Yu Eroshenko
چکیده

The third law of black hole thermodynamics is violated in the test fluid approximation for the process of phantom energy accretion onto a rotating or an electrically charge black hole. The black hole mass is continuously decreasing but the angular momentum or electric charge is remaining constant in this process. As a result, a black hole reaches the extreme state during a finite time with a threat of black hole transformation into the naked singularity and violation of the cosmic censorship conjecture. We demonstrate this by using new analytical solutions for spherically symmetric stationary distribution of a test perfect fluid with an arbitrary equation of state in the Reissner-Nordström metric. Our speculative assumption, however, is that the cosmic cosmic censorship conjecture remains valid even for phantom energy case if one takes into account the back reaction of an accreting fluid onto a near extreme black hole. Some hint for the validity of this hypothesis comes from the specific case of the ultra-hard fluid accretion onto the rotating black hole. In this case the energy density of an accreting fluid diverges at the event horizon of an extreme black hole, thus violating the test fluid approximation. PACS numbers: 04.20.Dw, 04.70.Bw, 04.70.Dy, 95.35.+d

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تاریخ انتشار 2008