Scientists have discovered a star that appears to have survived a supernova explosion.
A group of astronomers searching for the location of the single thermonuclear supernova SN2012Z through the Hubble Space Telescope were surprised to discover that the star had escaped the explosion.
Not only did it survive, but the stars after the supernova were even brighter than before.
No one expected the surviving stars to be more dazzling. It was a real puzzle,” said McCall, a postdoctoral fellow at the University of California, Santa Barbara and the Ruskun Respiration Observatory.
The incomprehensible results give us new information about the origins of the world’s most common yet mysterious explosions.
The team believes that the half-exploded star became more dazzling as it rose to a much larger position. Over time, they hope the stars will slowly return to their original state.
“This surviving star is a bit like Obi-Wan Kenobi, who returned as a phantom force in Star Wars,” said Andy Howell, principal investigator at Las Cambros Observatory.
Nature tried to defeat this star, but it came back stronger than we had imagined. He is the same star again, but in a different way. Beyond death “
Thermonuclear supernovae, also known as Type Ia supernovae, are important for measuring the distance of the universe. Observations of these explosions since 1998 show that the universe is constantly expanding at an accelerating rate.
This is believed to be due to dark energy, and its discovery won the Nobel Prize in Physics in 2011.
The origin of the thermonuclear supernova is not well understood, but astronomers believe it is the destruction of a white dwarf, which is about the same mass as the mass of the Sun packed into the size of the Earth.
In 2012, supernova 2012Z was discovered in the nearby spiral galaxy NGC 1309. This galaxy has been extensively studied and photographed in many Hubble images over the years.
SN 2012Z was a rare type of thermonuclear explosion known as an Iax supernova. This is a darker, weaker cousin of the more traditional Type Ia. Some scientists have determined that they are type Ia supernovae that have failed because they are not very powerful and explode slowly. New observations confirm this hypothesis
What is a supernova?
Supernovae are powerful and bright stellar explosions. This happens during the last evolutionary stage of a giant star.
This is the largest explosion humans have ever seen. Each explosion is a very dazzling and super powerful starburst.
For decades, scientists believed that the Type Ia supernova exploded when the white dwarf reached a mass limit of about 1.4 times that of the Sun, called the Chandrasekhar limit.
Astronomers weren’t sure if they were getting close to the edge of Chandrasekhar before the star exploded. The study authors now believe that this surge to the bottom line is exactly what happened with SN2012Z.
New discoveries indicate that supernovae can rise at least to the limit and explode.
Scientists are now trying to understand what causes supernovae to fail and what makes them successful as Type Ia.
Source: Metro
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