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Formation of intermediate-mass black holes as primordial black holes in the inflationary cosmology with running spectral index

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arxiv 0711.3886 v2 pith:P7R7EPTO submitted 2007-11-25 astro-ph hep-ph

Formation of intermediate-mass black holes as primordial black holes in the inflationary cosmology with running spectral index

Toshihiro Kawaguchi , Masahiro Kawasaki , Tsutomu Takayama , Masahide Yamaguchi , Jun'ichi Yokoyama This is my paper
classification astro-ph hep-ph
keywords blackholesindexpbhsprimordialrunningscalesspectral
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Formation of primordial black holes (PBHs) on astrophysical mass scales is a natural consequence of inflationary cosmology if the primordial perturbation spectrum has a large and negative running of the spectral index as observationally inferred today, because double inflation is required to explain it and fluctuations on some astrophysical scales are enhanced in the field oscillation regime in between. It is argued that PBHs thus produced can serve as intermediate-mass black holes (IMBHs) which act as the observed ultraluminous X-ray sources (ULXs) by choosing appropriate values of the model parameters in their natural ranges. Our scenario can be observationally tested in near future because the mass of PBHs is uniquely determined once we specify the values of the spectral index and its running on large scales.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Revisiting PBH accretion, evaporation and their cosmological consequences

    astro-ph.HE 2025-12 conditional novelty 6.0

    Relativistic accretion onto Kerr primordial black holes gives roughly 4.5x mass growth and fast spin-down, strengthening BBN bounds, lowering the survival mass to ~2.7e14 g, and erasing the high-frequency stochastic g...

  2. Evaporation of Primordial Black Holes in a Thermal Universe: A Thermofield Dynamics Approach

    hep-th 2025-12 unverdicted novelty 5.0

    Thermal bath corrections derived via thermofield dynamics enhance the evaporation rate of primordial black holes, shortening their lifetimes relative to zero-temperature calculations.