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How artificial intelligence can find the source of gamma-ray bursts – Phys.org

December 12, 2022 by AVA Leave a Comment

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December 8, 2022
by Paul M. Sutter, Universe Today
Gamma-ray bursts come in two main flavors, short and long. While astronomers believe that they understand what causes these two kinds of bursts, there is still significant overlap between them. A team of researchers have proposed a new way to classify gamma-ray bursts using the aid of machine learning algorithms. This new classification scheme will help astronomers better understand these enigmatic explosions.

Ever since the 1960s, astronomers have identified brief intense bursts of high energy gamma ray radiation. These bursts come from all over the sky, and so they likely come from outside the galaxy. Over the decades astronomers have identified two different kinds of these gamma-ray bursts, which they call short and long. The short ones last for less than two seconds on average and account for around 30% of all bursts. The remainder, the long ones, tend to be much brighter than their shorter counterparts.
Most astronomers believe that different processes lead to the two different populations of gamma-ray bursts. It’s thought that mergers of compact objects like neutron stars lead to the short gamma-ray burst emissions. And on the other hand, it’s likely that exotic kinds of supernova explosions lead to the long ones. In the latter case, if large enough stars explode with high enough rotation rates, the exploding material can swirl around and form a beam of radiation that blasts out into space. If that beam happens to point toward the Earth, we see it as a long gamma-ray burst.
But telling the difference between the two is difficult. Many gamma-ray bursts sit right on the boundary between short and long, and some explosions share qualities of both.
A team of researchers have proposed a new mechanism for distinguishing these two classes of observations. They employed machine learning algorithms trained on existing data sets and computer simulations to find the key distinguishing features between short and long gamma-ray bursts. They found that they were able to cleanly separate the populations of observations even when the duration time of the blast was right at the boundary.
The work is published on the arXiv preprint server.
The astronomers hope that this tool will be useful to help easily classify future observations, which can then be used to refine our understanding of the physical mechanisms behind the explosions.

More information: Jia-Wei Luo et al, Identifying the physical origin of gamma-ray bursts with supervised machine learning, arXiv (2022). DOI: 10.48550/arxiv.2211.16451

Journal information: arXiv

Provided by Universe Today

Citation: How artificial intelligence can find the source of gamma-ray bursts (2022, December 8) retrieved 12 December 2022 from https://phys.org/news/2022-12-artificial-intelligence-source-gamma-ray.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

More information: Jia-Wei Luo et al, Identifying the physical origin of gamma-ray bursts with supervised machine learning, arXiv (2022). DOI: 10.48550/arxiv.2211.16451

Journal information: arXiv

Journal information: arXiv
Provided by Universe Today
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