Tests for coalescing binary neutron stars as cosmological origin of gamma-ray bursts |
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| Authors: | V M Lipunov I E Panchenko K A Postnov M E Prokhorov |
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| Institution: | (1) Sternberg Astronomical Institute, 13, Universitetskij pr., 119899 Moscow, Russia |
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| Abstract: | Theoretical logN-logS distributions and (V/V
max) tests of gamma-ray bursts in the model of coalescence of neutron star (NS+NS) and/or NS+black hole (NS+BH) binaries are calculated for a flat Universe ( =1) with different values of the cosmological constant  and under various assumptions about the star formation history. The observed logN-logS distribution and value of (V/V
max)=0.33 for 411 bursts with knownC
max/C
lim from the 2d BATSE catalogue are best fitted with a model for which = 0.2 and primary star formation occurs at redshiftsz 5–6. |
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| Keywords: | Neutron stars gamma-ray bursts cosmology |
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