SIMBAD references

2015ApJ...807...76L - Astrophys. J., 807, 76 (2015/July-1)

The two-point correlation function of gamma-ray bursts.

LI M.-H. and LIN H.-N.

Abstract (from CDS):

In this paper, we examine the spatial distribution of gamma-ray bursts (GRBs) using a sample of 373 objects. We subdivide the GRB data into two redshift intervals over the redshift range 0 < z < 6.7. We measure the two-point correlation function, ξ(r), of the GRBs. In determining the separation distance of the GRB pairs, we consider two representative cosmological models: a cold dark matter universe plus a cosmological constant Λ, with (Ωm, ΩΛ) = (0.28, 0.72), and an Einstein-de Sitter universe, with (Ωm, ΩΛ) = (1, 0). We find a z-decreasing correlation of the GRB distribution, which is in agreement with the predictions of the current structure formation theory. We fit a power-law model to the measured ξ(r) and obtain an amplitude and slope of Mpc and γ = 0.80±0.19, respectively (1σ confidence level), over the scales r = 200-104 h–1 Mpc. Our results provide a supplement to the measurement of matter correlation on large scales, while the matter distribution below 200 h–1 Mpc is usually described by the correlation function of galaxies.

Abstract Copyright:

Journal keyword(s): cosmology: observations - gamma-ray burst: general - large-scale structure of universe - methods: statistical

VizieR on-line data: <Available at CDS (J/ApJ/807/76): table2.dat>

Simbad objects: 375

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