INTERMEDIATE-MASS BLACK HOLES
Intermediate-mass black holes (IMBHs)
[400] "Desperately Seeking Intermediate-Mass Black
Holes" by Paul H. Frampton. arXiv:0904.2934[hep-th].
An IMBH is defined as a black hole with mass
between 30 and 300,000 solar masses.
In [400] it is pointed out that the second law of
thermodynamics and observational limits strongly
suggest there exist in the universe trillions of
such black holes (IMBHs) with total mass a few
billion trillion times the mass of the Earth or a
billion trillion trillion trillion kilograms.
By comparison, the total mass of real on-mass-shell
(not virtual) charmed quarks in the Universe may be
less than a kilogram. Unlike the IMBHs which last for
gigayears and more, charmed quarks live for only about
a picosecond.
Open questions about intermediate-mass black holes:
(i) How can they be detected in significant numbers?
(ii) Is their formation related to Population-III stars?
(iii) Can their formation be studied assiduously in high
resolution simulations of the dark matter halo?
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