Friday 07 March 2025
A team of scientists has made a breakthrough in understanding the powerful explosions that occur when massive stars collapse under their own gravity. By studying the remnants of one such explosion, they’ve discovered a key factor that determines whether these events produce a burst of light or a long-lived glow.
Supernovae are catastrophic events that mark the end of a star’s life. When a massive star runs out of fuel, its core collapses, triggering a chain reaction that releases an enormous amount of energy in the form of light and heat. But not all supernovae are created equal. Some produce a brief flash of light, while others shine brightly for weeks or even months.
The team behind this new discovery focused on a type of supernova known as PISN (pair-instability supernova). These events occur when a star is so massive that its core collapses before it can explode. The result is a burst of energy that’s unlike any other type of supernova.
By analyzing the remnants of one such explosion, the scientists were able to identify a crucial factor that determines whether a PISN produces a brief flash or a long-lived glow. It turns out that the amount of radioactive material produced during the collapse plays a key role in shaping the event’s light curve.
When a star collapses, it releases a flood of energy that heats up surrounding material. This heat can cause nearby elements to ionize and emit light, creating a burst of radiation that can be detected from great distances. But if there’s not enough radioactive material present, this burst will be short-lived, fading quickly as the hot gas cools.
On the other hand, if the collapse produces a significant amount of radioactive material, it can continue to heat up the surrounding material for weeks or even months after the initial explosion. This is because radioactive decay releases energy at a steady rate, sustaining the glow long after the initial burst has faded.
The team’s findings have important implications for our understanding of these powerful events. By studying the light curves of PISNe, scientists may be able to use them as probes of the early universe, when stars were still forming and exploding in great numbers.
Moreover, this research could also shed light on the origins of certain elements found in the cosmos. Some of these elements, such as nickel-56, are thought to be produced during supernovae explosions. By understanding how these events occur, scientists may be able to better understand where these elements come from and how they’re distributed throughout the universe.
Cite this article: “Unraveling the Secrets of Powerful Star Explosions”, The Science Archive, 2025.
Supernovae, Stars, Explosions, Collapse, Gravity, Light, Glow, Radiation, Radioactive Material, Elements
Reference: Nikolai N. Chugai, “PISN 2018ibb: radioactive emission of [O III] lines” (2025).
