期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 10, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2017/10/034
关键词
primordial black holes; X-ray binaries
资金
- JAXA international top young fellowship
- JSPS KAKENHI Grant [JP16K13813]
- U.S. Department of Energy [DE-SC0009937]
- World Premier International Research Center Initiative (WPI), MEXT, Japan
We set a new upper limit on the abundance of primordial black holes (PBH) based on existing X-ray data. PBH interactions with interstellar medium should result in significant fluxes of X-ray photons, which would contribute to the observed number density of compact X-ray objects in galaxies. The data constrain PBH number density in the mass range from a few M-circle dot to 2 x 10(7) M-circle dot. PBH density needed to account for the origin of black holes detected by LIGO is marginally allowed.
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