2026/04/15 by Istvan Horvath, I. Horváth, Zsolt Bagoly +12 · 1 citation
Physics and Astronomy · #Astronomy and Astrophysical Research #Cluster (spacecraft) #Gamma-ray bursts and supernovae #Homogeneity (statistics) #Isotropy #Northern Hemisphere #Position (finance) #Redshift #SPHERES #Spatial distribution #Standard deviation #Stellar, planetary, and galactic studies
paper · pdf · open access · doi:10.1093/mnras/stag666
published in Monthly Notices of the Royal Astronomical Society 548(3) (Oxford University Press)
openalex publication_date 2026/04/24 · openalex created_date 2026/05/05 · openalex updated_date 2026/08/05
ABSTRACT In the past few decades, large universal structures have been found that challenge the homogeneity and isotropy expected in standard cosmological models. This study examines burst clustering in both galactic hemispheres using a recently developed methodology, using spheres in 3D space for testing regularities. Using our new method in both hemisphere we find only one deviation from isotropy. A small one in the Southern and a huge one in the Northern hemisphere. This itself suggests that the two deviations do not likely to come from statistical fluctuation. The northern huge group contains app. 125 gamma-ray bursts (GRBs) corresponds with the so-called Hercules-Corona Borealis Great Wall. The southern group contains 4–5 GRBs locating very close to each other. Two of them (GRB050822 and GRB050318) are close not just in redshift and the angular position but they are very close in observing time (5 months). We concluded that the third important result of this work that this method could not find other spherical overdensity deviation from homogeneity in the GRBs spatial distribution. We have shown that the large-scale density increase in the spatial distribution of gamma-ray bursts does not necessarily violate the cosmological principle.