期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 7, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2021/07/041
关键词
dark matter theory; modified gravity; primordial black holes; quantum black holes
资金
- National Natural Science Foundation of China [11922508]
Recent research suggests that black hole remnants of primordial origin are not a suitable candidate for dark matter; however, for models based on non-commutative black holes, the scale of non-commutative effects can reach about 100 times the Planck length.
It has recently been suggested that black hole remnants of primordial origin are not a viable dark matter candidate since they would have far too large a velocity due to the recoil of Hawking radiation. We re-examined this interesting claim in more details and found that it does not rule out such a possibility. On the contrary, for models based on non-commutativity of spacetime near the Planck scale, essentially the same argument can be used to estimate the scale at which the non-commutativity effect becomes important. If dark matter particles are non-commutative black holes that have passed the maximum temperature, this implies that the non-commutative scale is about 100 times the Planck length. The same analysis applies to other black hole remnants whose temperature reaches a maximum before cooling off, for example, black holes in asymptotically safe gravity.
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