Blackhole

The Brightest-ever Supernova which was detected last year, positioning in about four billion light years distant from Earth is nothing than a star-swallowing Black Hole, revealed the newly conducted study. An intense flare, which previously believed to be a supernova, is actually a Tidal Disruption Event (TDE) – the annihilation of a star by a quickly revolving supermassive black hole, said the new research report.

The study published in the journal “Nature Astronomy” revealed that the brightest supernova ever is expected to be triggered by the volatile death of a star being swallowed by a monster black hole. To recall, Supernovas usually caused by the explosions that triggered when stars die, either after finishing of fuel or because of a sudden arrival of new objects. Such explosions can temporarily overtake all of the other stars existed in their nearby galaxies.

In January this year, astronomers by analysing the data received from the All-Sky Automated Survey for Supernovae (ASAS-SN) detected an event of an explosion which is reported to be more than twice as bright as any recognised supernova. The blast, which was named as ASASSN-15lh, took place in the sky, around 3.8 billion light-years from Earth, at the edge of the southern constellations Indus and Tucana. The explosion emitted around 570 billion times more light than the sun does at its highest point.

Previously, researchers believed the ASAS-SN to be brightest-ever Supernova. But now they think that this explosion may have occurred because of the death of a star which was being swallowed by a Supernova black hole which is billions of times larger than Sun.

On this context, the lead author of the study and an astrophysicist of the Weizmann Institute of Science in Rehovot, Israel, and the Dark Cosmology Centre in Denmark, Giorgos Leloudas said, “Throughout the research, we have found a number of factors that are suggesting the ASASSN-15lh not to be a super-luminous supernova. For example, it occurred in a big, flushed galaxy, which is a location where the occurrence of super-luminous supernovae is not just possible.”

Taking the statement further, he also stated that, “We were observing and gazing at ASASSN-15lh since last ten months and following up each and every happening. During the follow-up, we found that the way the flare-up went forward over time is not steady with an increasing ball of gas. Rather than, cooling down over time as supernovas used to do,” this so-called supernova, after 100 days, went ahead towards a more warmth condition, and maintained the high temperature at a steady rate for a longer time, and it is still continuing in the same manner.

Leloudas and his team cautioned that “Currently, they can’t give the complete assurance about the ASASSN-15lh to be TDE, and neither can they explain every detail of the study. Still, “by going through the theory they have published, one can be acquainted with the missing pieces.”