Can large black holes collide in de Sitter space-time? An inflationary scenario of an inhomogeneous universe

Tetsuya Shiromizu, Ken Ichi Nakao, Hideo Kodama, Keiichi Maeda

    Research output: Contribution to journalArticle

    35 Citations (Scopus)

    Abstract

    We investigate black holes in asymptotically de Sitter space-times. We show that a trapped surface always appears inside the event horizon and the total area of the black holes does not decrease as in asymptotically flat space-times. We find, however, that there is an upper bound on the area of apparent horizons in a wide class of asymptotically de Sitter space-times, in contrast with asymptotically flat space-times. This implies that black holes with a large area cannot collide with each other in asymptotically de Sitter space-time, unless a naked singularity is formed. On the basis of these results we argue that the inflationary scenario works even for initially inhomogeneous universes.

    Original languageEnglish
    JournalPhysical Review D
    Volume47
    Issue number8
    DOIs
    Publication statusPublished - 1993

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    universe
    naked singularities
    event horizon
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    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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    Can large black holes collide in de Sitter space-time? An inflationary scenario of an inhomogeneous universe. / Shiromizu, Tetsuya; Nakao, Ken Ichi; Kodama, Hideo; Maeda, Keiichi.

    In: Physical Review D, Vol. 47, No. 8, 1993.

    Research output: Contribution to journalArticle

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