A team of astronomers announces that they have identified a record number of 25 new “fast radio bursts” (FRBs). The discovery doubles the known population of these super-energetic cosmic explosions and will help better understand their origins. Details of this work are published The Astrophysical Journal.
What is an FRB?
Fast Radio Bursts (FRB Fast radio bursts in English) radio broadcasts Very serious Detected from deep space. Some may even become as bright as their parent galaxy. These emissions are rare and fleeting. They only last a few milliseconds, so they are very difficult to detect.
FRBs were first discovered in 2007 by researchers studying archival data from radio telescopes. Since then, more than a hundred of them have been identified. Most were single events, meaning they occurred only once and were not observed again. However, some of these events recurred, sometimes at regular rates.
These two FRB populations appear to have different characteristics, including their duration and the frequency range at which they are observed. Suggests different possible looks. These are on the other hand Still largely unknown.
FRBs are thought to be created by catastrophic events in space, such as neutron star collisions or supernova explosions. More unusual theories also raise the possibility that they were created by extraterrestrials. However, to better understand them, it is necessary to find as many of them as possible, hence the interest of this recent work.
A duplicate model
A team from the Canadian Hydrogen Intensity Mapping Experiment (CHIME) and the University of Toronto collaboration announce that they have identified Twenty-five new recurring FRBsThis brings the total of known cases to fifty.
We owe this innovation to new statistical tools for combining large amounts of data collected by radio telescopes. ” We can now accurately calculate the probability that two or more explosions from similar locations are not coincidental.“, notes team member Ziggy Blunis.” These new tools are essential to this study and will be very useful for similar research in the future.“.
A surprising aspect of this new research is the discovery of many repeating FRBs Amazingly passive, producing less than one eruption per week during the observation period. Researchers believe this may be because these events have not been observed long enough to see a second eruption. Analytical work continues, but researchers have already been able to focus on some of these recurring sources, identifying at least two galaxies among them.