Primordial Black Holes in an Accelerating Universe
نویسنده
چکیده
General expressions are given for the generation of Primordial Black Holes (PBH) in a universe with a presently accelerated expansion due to a(n effective) cosmological constant. We give expressions both for a powerlaw scalefree primordial spectrum and for spectra which are not of that type. Specializing to the case of a pure cosmological constant Λ and assuming flatness, we show that a comological constant with ΩΛ,0 = 0.7 will decrease the mass variance at the PBH formation time by about 15% compared with a critical density universe. PACS Numbers: 04.62.+v, 98.80.Cq
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تاریخ انتشار 2001