2001/01/22 by Robert J. Nemiroff, G. F. Marani, Gabriela F. Marani +4 · 52 citations
Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Cosmic distance ladder #Galaxy #Gamma-ray burst #Gamma-ray bursts and supernovae #Globular cluster #Gravitation #Gravitational wave #Null (SQL) #Omega #Physics #Population #Pulsars and Gravitational Waves Research #Quantum mechanics #Range (aeronautics) #Redshift #Supermassive black hole #Universe #astro-ph
paper · pdf · doi:10.1103/physrevlett.86.580
published in Physical Review Letters 86(4), 580-583 (American Physical Society) · 14 pages including 3 figures, appeared 2001 January 22
openalex publication_date 2001/01/22 · arxiv created 2001/01/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A new search for the gravitational lens effects of a significant cosmological density of supermassive compact objects (SCOs) on gamma-ray bursts (GRBs) 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, Omega(SCO)<0.1 is favored for SCO masses in the range 10(5)<M(SCO)/M( middle dot in circle)<10(9), 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 did not come out of the primordial universe or condense at recombination.