Get a short URL
It has been suggested that the final shrinkage of existing white dwarfs to supermassive black dwarfs with little or no heat or light would cause the final star to explode due to the so-called “sugar quantum tunneling ”. But, fortunately, we have quite a bit of time to reflect on the script.
The last explosions that ever happen on Earth will be trillions of years from now, ending in a “black dwarf supernova,”; according to a new study to be published in the journal. Royal Astronomical Society monthly announcement and is now reported by Newsweek.
The study is based on the assumption of so-called massive freezing or great freezing – an astrophysical process involving impending energy shortages in the universe.
The lead author, an associate professor of physics at Illinois State University, Matt Caplan, begins his observations from a white dwarf, which does not explode but gradually shrinks, turning into a close-sized “black dwarf”. equal to Earth but as heavy as the Sun. , no longer emits light or heat.
This is when and where nuclear reactions will take place in black dwarfs, but at a much slower rate than today’s existing stars, Caplan deduced.
Remnants of the Cassiopeia A supernova
These reactions can eventually lead to explosions through so-called quantum tunnels. “Nuclear reactions, through quantum tunneling, turn a star into iron for a very long time,” Caplan told Newsweek in an email and explained that once the star contains enough iron, “it will explode. very fast like today’s supernovae. “
“Quantum tunneling makes ‘forbidden’ reactions possible if you wait long enough,” Caplan says, drawing parallel between molten reactions on stars like their Sun, Caplan said. me and the black dwarf.
In conventional stars, fusion takes place because surrounding nuclei sometimes collide, while in black dwarfs, there is not enough energy for these fusion reactions to continue. “However, the nuclei still have a small chance to incorporate spontaneously and essentially ‘cross over’ ‘the barrier from electrical repulsion, Caplan recalls. quantum”.
These reactions will take a long time to complete. Caplan estimates the first “black dwarf supernova” will take place 10 ^ 1,100 years into the future. According to him, this is the same as saying a trillion, almost 100 times, with the black dwarf supernova finally happening in about 10 ^ 32,000 years, according to the researcher.
Caplan is currently planning to simulate the landmark – and completely final – event in human history today, as no one will see it, the scholar explained.