Null GRB Millilensing Search Limits Universe Composition

Details Null GRB Millilensing Search Limits Universe Composition Null GRB Millilensing Search Limits Universe Composition

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.7304n&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #73.04; Bulletin of the American Astronomical Society, Vol. 32, p.1519

Mathematics

Logic

Scientific paper

A new search for the gravitational lens effects of a significant cosmological density of supermassive compact objects (SCOs) on gamma-ray bursts has yielded a null result. We inspected the timing data of 774 BATSE-triggered GRBs for evidence of millilensing: repeated peaks similar in light-curve shape and spectra. Our null detection leads us to conclude that, in all candidate universes simulated, Ω SCO < 0.1 is favored for 105 < MSCO}/M{sun < 109, while in some universes and mass ranges the density limits are as much as 10 times lower. Therefore, a cosmologically significant population of SCOs near globular cluster mass neither came out of the primordial universe, nor condensed at recombination.

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