Using gamma-ray bursts to detect a cosmological density of compact objects

Details Using gamma-ray bursts to detect a cosmological density of compact objects Using gamma-ray bursts to detect a cosmological density of compact objects

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...391l..63b&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 391, no. 2, June 1, 1992, p. L63-L66. Research supported by NSERC

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Dark Matter, Gamma Ray Bursts, Gravitational Lenses, Astronomical Models, Astronomical Spectroscopy, Computational Astrophysics, Red Shift

Scientific paper

If gamma-ray bursts come from cosmological distances, then a significant fraction of them will be lensed. Multiple images will be detected by the time delays between the two images. The shortest bursts are sensitive to lens masses greater than about 250 solar masses. The observed fraction of double images provides a direct measure of Omega(compact) as a function of the assumed maximum redshifts of the burst sources. The results depend weakly on the cosmological model and the burst spectra.

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