Black hole MACHO and its identification.

Details Black hole MACHO and its identification. Black hole MACHO and its identification.

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998phr...307..181n&link_type=abstract

Physics Reports, Vol. 307, No. 1 - 4, p. 181 - 190

Physics

4

Black Holes: Gravitational Radiation, Black Holes: Cosmology

Scientific paper

If MACHOs are primordial black holes of mass ≡0.5 Msun (BHMACHO), it is extremely difficult, if not impossible, to identify BHMACHOs by their accretion-driven emission. However using gravitational wave detectors, BHMACHOs may be identified. There may exist ≡5×108 BHMACHO binaries in the halo up to ≡50 kpc whose coalescing time due to the emission of gravitational waves is comparable to the age of the universe. This means that the event rate will be ≡5×10-2 events/yr/galaxy and several events/yr within 15 Mpc are expected. The gravitational waves from such coalescing BHMACHO binaries, if they exist, can be detected by LIGO, VIRGO, TAMA and GEO within the next 5 years.

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