By Matthew Williams
April 16, 2025
Gamma rays of Burf (GrBS) are the energetic events that have ever been observed in the universe. These mighty outbursts can shine a quintillion (1018) lighter than the sun. Since they were discovered by Vela 3 and 4 satellites in 1967, which were designed to detect nuclear detonations, astronomers have been looking for the origin of these events. It is currently generally recognized that long-term GRBs are caused by the collapse of massive stars, while short-term ports are caused by the merger of binary objects (neutron stars and/or black holes).
Astronomers recently considered how these powerful events could be used to examine star formation in early galaxies and measure cosmic distances. In a recently published work, a team of American and Hungarian scientists suggests using GrBS to examine the large -scale structure of the universe. As you explain, this method could enable astronomers and cosmologists to solve unanswered questions about current cosmological models and the structure of the universe.
Research was run by Istvan Horvath, professor of physics and natural sciences at the National University of Public Service (NUPS) in Budapest, Hungary. For him, colleagues from the Eötvös University, the Research Center for Astronomy and Geosciences at Konkoly Observatory, the University of Debrecen, the Center for Space Plasma and Aeronomic Research (SCPA) Alabama in Huntsville joined him. The paper that recently describes its findings appeared in the journal universe.
According to the cosmological standard models, the universe is homogeneous and isotrop on large scales, which means that it appears similar in every place and direction and has no specific center. This is known as a cosmological principle that is derived from the Copernican principle that argues that no position in the universe is unique or special. However, several cosmic structures that question this principle were observed using the GrBS and other bright objects. This includes Lopez '”Giant Bow”, a galaxy clustering that covers an estimated 3.3 billion light years.
As the authors notice, GRBS are so bright that they can be observed at large distances. Using current instruments, CRBs were recognized for red shifts of Z = 7 or higher, which corresponds to cosmic distances of around 13 billion light years. In recent years, astronomers have used these events to recognize other surveillance, including Galaxy clusters such as the Sloan Great Wall, the South Pole Wall and the King Ghidorah Supercluster. Then there is the Hercules Corona Borealis Great Wall (Hercrbgw), the largest cosmic structure that has ever been observed (measurement of an estimated 10 billion light years).
As the team explains, the assumption that large anisotropic regions are common in the universe could be used to explore them. While earlier studies with GRBS showed slight anisotropias in the distribution of matter, these efforts were complicated because early instruments could not measure the GRB removal. This problem was solved when astronomers discovered that red shifts could be measured based on the observations of GRB glow.
In addition, the temporary nature of GrBS means that at a certain point in time only parts of all large structures can be observed. The key here is the implementation of integrated time tensioners Observations of burdens that provide larger samples that can be used for measuring structures and for comparison with the universal average. For the team, this consisted of the use of GRB databases, which contained measurements of their position, follow -up and red shifts.
Most of them were detected by Neil Gehrel's NASA Swift Observatory and Fermi Gammastray-Wtraum Telescope. At the same time, red shifts were mainly made from the Gammastray Burst online index (GRBOX), updated data from the Gammastray coordinate network (GCN) and the publicly available data record by Jochen Greiner of the Max Planck Institute for the Exterior Restrial Physics (MPE). From these sources they identified 542 GRBs with precisely measured red shifts and well -known angular points.
Of these were 262 in the northern galactic hemisphere, where they concentrated their analysis (and where the Hercrbgw is). In previous work, Horvath and his colleagues identified three clusters in this structure. In this most recent study, they identified a fourth cluster that included the third, which contained 110 to 120 GRBs and encompassed a larger red shift area than the two previous (0.33 ≤ z ≤ 2.43). As you are completed, these results suggest that Hercrbgw in radial size is considerably larger than previously assumed.
Their results also show the potential of using the GrBS to examine distances, structure and other cosmic parameters. However, they also find that their study was exposed to distortions and unsolved questions about the spatial distribution of GRBS. “As a result, large anomalies can exist in the spatial distribution of GRB that cannot necessarily be seen in other cosmic objects,” they said. “Further detailed observations are required to get a satisfactory solution for this problem.”
Further reading: Arxiv
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