Scientists used supernova sounds recorded produced in a distant past to obtain objective and measurable proofs of the lopsided nature of star explosions.
In 1987, a star explosion was seen from the Earth. More than two decades after, the sounds of the blast were recorded from our planet.
The galaxy where the star exploded is situated more than 168,000 light years away from Earth. Astronomers studied the remains of the explosion in order to learn more about its past and how it developed to the final stage of its life.
The star explosion sounds gave valuable information to the scientists related to the physics of a supernova.
The study had been performed by the researchers at the University of Sydney, who used a distant telescope from Australia to record the sounds emitted by the star explosion.
The light of the blast outshined an entire galaxy, as the star collapsed under its own weight. The supernova had the size of eight Suns, and when eventually running out of fuel, it developed a heart of iron.
The supernova was situated in the Large Magellanic Cloud, near the Tarantula Nebula, and the supernova was visible from Earth without the need of a telescope. It was the closest observable supernova since the blast of SN 1604 in the Milky Way.
The supernova explosion offered the chance to observe the radioactive source of energy that produced light emissions from its two nuclei. The event was almost simultaneously discovered by one scientist in Chile and a second physicist in New Zealand. The star that created the explosion was identified four days later as Sanduleak -69° 202.
Previous studies followed the material released by the star in its supergiant phase. However, the latest research focused on the low-frequency radio waves produced by the former star.
The Murchison Radio-astronomy Observatory is dedicated to sensitive observations, as it’s situated in the quietest place on Earth.
The low-frequency radio streams offered information on the density of matter located next to the supernova remnant. The researchers had the opportunity to study cosmic ray acceleration.
The former star lost matter, and it generated winds at a slower pace than previously believed. Based on the supernova sounds, the physicians discovered more information on the life history of the 1987A blast.
The computer simulations revealed that the explosions might be asymmetrical, and the current observations confirmed the model. The explanation is that Titanium-44 is unstable and decays into calcium, which creates blasts of material moving away from the observation point.
The speed of the material ejected in the explosion was determined to be of 1.6 million miles per hour, and the scientists are now sure that core-collapse supernovas are lopsided.
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