Reanalysing large-scale structure using an updated gamma-ray burst spatial density approach
arXiv:2604.13712 · doi:10.1093/mnras/stag666
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 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.
accepted for publication
References in corpus (28)
- The Burst Alert Telescope (BAT) on the Swift MIDEX Mission
- A Map of the Universe
- The nature of "dark" gamma-ray bursts
- A structure in the early universe at z ~ 1.3 that exceeds the homogeneity scale of the R-W concordance cosmology
- Gamma-ray Burst Cosmology
- Fractal Dimension as a measure of the scale of Homogeneity
- Possible structure in the GRB sky distribution at redshift two
- The Optically Unbiased Gamma-Ray Burst Host (TOUGH) Survey. VII. The Host Galaxy Luminosity Function: Probing the Relationship Between GRBs and Star Formation to Redshift
- A giant ring-like structure at 0.78<z<0.86 displayed by GRBs
- New data support the existence of the Hercules-Corona Borealis Great Wall
- First-order Cosmological Perturbations Engendered by Point-like Masses
- Gamma-ray bursts afterglow physics and the VHE domain
- A Giant Arc on the Sky
- Two close Large Quasar Groups of size ~ 350 Mpc at z ~ 1.2
- Testing Isotropic Universe Using the Gamma-Ray Burst Data of Fermi / GBM
- The clustering of gamma-ray bursts in the Hercules-Corona Borealis Great Wall: the largest structure in the Universe?
- Some statistical remarks on the Giant GRB Ring
- Cosmicflows-3: The South Pole Wall
- Testing the homogeneity of the Universe using gamma-ray bursts
- Unveiling dark forces with measurements of the Large Scale Structure of the Universe
- Update on Testing the Isotropy of the Properties of Gamma-Ray Bursts
- Does the GRB Duration Depend on Redshift?
- GRBs and fundamental physics
- King Ghidorah Supercluster: Mapping the light and dark matter in a new supercluster at z=0.55 using the Subaru Hyper Suprime-Cam
- Searching for galactic sources in the Swift GRB catalog
- Studying the variability of the X-ray spectral parameters of high-redshift GRBs' afterglows
- Scanning the Universe for Large-Scale Structures using Gamma-Ray Bursts
- New Insights on Gamma-Ray Burst Radiation Mechanisms from Multiwavelength Observations