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Evolution of the double neutron star merging rate and the cosmological origin of gamma-ray burst sources

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arxiv astro-ph/9504045 v1 pith:GKEMC5AI submitted 1995-04-13 astro-ph

V.M. Lipunov , K.A. Postnov , M.E. Prokhorov , I.E. Panchenko (Sternberg Astronomical Inst. , Moscoww , Russia) This is my paper · ORCID
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keywords starcosmologicalevolutionformationgalaxiesgamma-raymergingneutron
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Evolution of the coalescence rate of double neutron stars (NS) and neutron star -- black hole (BH) binaries are computed for model galaxies with different star formation rates. Assuming gamma-ray bursts (GRB) to originate from NS+NS or NS+BH merging in distant galaxies, theoretical logN--logS distributions and <V/V_max> tests of gamma-ray bursts (GRB) are calculated for the first time taking the computed merging rates into account. We use a flat cosmological model (Omega=1) with different values of the cosmological constant Lambda and under various assumptions about the star formation history in galaxies. The calculated source evolution predicts a 5-10 times increase of the source statistics at count rates 3-10 times lower than the exising BATSE sensitivity limit. The most important parameter in fitting the 2nd BATSE catalogue is the initial redshift of star formation, which is found to be z_*=2-5 depending on a poorly determined average spectral index of GRB.

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Cited by 2 Pith papers

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    astro-ph.CO 2026-08 conditional novelty 5.0 of 10

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  2. Early Optical Follow-up of Gamma-Ray Bursts: The Critical Role of Robotic Telescopes

    astro-ph.HE 2026-06 unverdicted novelty 2.0 of 10

    A review of early optical GRB features including prompt emission, reverse shocks, and afterglow onset, highlighting robotic telescopes' role in constraining jet Lorentz factors and magnetization.

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