For the first time, astronomers have witnessed a supernova explosion occurring in unique circumstances. They recorded that the event took place at the moment when the dead star was inside another star.
Image via: pikist.com
The phenomenon in question was recorded by employees of the Roque de los Muchachos observatories in the Canary Islands and Las Campanas in Chile. The type Ia supernova LSQ14fmg exploded and became one of the brightest in its class, but at the same time the light propagation was much slower than usual. While scientists knew very little about these luminaries. It is known for certain that they tend to form into binary systems. Studying a unique case, which has not yet presented an opportunity to testify, experts have come to the conclusion that the energy of the explosion met some kind of obstacle on the way of its spread.
Usually, after the end of the life cycle, a supernova collapses, releasing huge reserves of energy, which is enough to form new galaxies. They also contribute to the expansion of the Universe, this time the volume of matter did not spread so quickly in outer space. After studying the phenomenon, the researchers concluded that LSQ14fmg, at the time of the explosion, was inside what was previously an asymptotic giant branch star (AGB). During the period of its extinction, a material shell formed around it, which held back the shock wave. Florida State University noted that the new knowledge will help astronomers better understand the nature of these stars.