期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 388, 期 3, 页码 1426-1432出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2008.13523.x
关键词
black hole physics; cosmology : theory; early Universe
资金
- JSPS [19740105, 18540254, 18740157, 16340076, 19340054]
- JSPS
- JSPS-AF Japan-Finland Bilateral Core Program
- World Premier International Research Center Initiative (WPI Initiative)
- MEXT, Japan
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 suggested 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 amplitude of the curvature perturbation, spectral index and its running on large scales.
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