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    Null geodesics in black hole metrics with non-zero cosmological constant

    Zdeněk Stuchlík · 01 května, 1991 · Fyzika · 0 comments
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    Publication date: May 1991

    Abstract:
    We study the radial motion along null geodesics in the Reissner-Nordström-de Sitter and Kerr-de Sitter space-times. We analyze the properties of the effective potential and we discuss circular orbits. We find that:

    1)

    the radius of circular photon orbits in the Reissner-Nordström-de Sitter space-times does not depend on the cosmological constant. We show also how this is related to properties of the optical reference geometry.

    2)

    For a specific range of the cosmological constant, photons with high impact parameter may travel radially between the cosmological horizon and the black hole horizon in the equatorial plane of the Kerr-de Sitter space-times.

    Authors:
    Stuchlik, Zdenek; Calvani, Massimo;

    https://ui.adsabs.harvard.edu/abs/1991GReGr..23..507S

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