WR stars are massive stars and strip their outer hydrogen shell, which is associated with the fusion of helium and other elements in the massive nucleus. Detecting certain types of massive supernova explosions could help investigate these stars, which is a mystery to scientists from around the world.
The four Indian scientists from the Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital, an autonomous institute under the Department of Science and Technology, and 16 scientists from various institutes in the USA, the United Kingdom, Canada, Ireland, Italy, Sweden and Korea presented the optical monitoring of one such supernova with a stripped casing called SN 2015dj in the Galaxy NGC 7371. They calculate the mass of the star that collapsed to form the supernovae, as well as the geometry of its ejection. The scientists also found that the original star was a combination of two stars – one of which is a massive WR star and another a star that is much less in mass than the sun.
Talk to
TOI
from South Korea, Mridweeka Singh, who was part of ARIES when the supernova discovery was made, said: ‘This supernova was discovered in 2015. We observed the supernova up to 170 days since its discovery. After that, we submitted the manuscript in February last year and accepted it on January 22 this year. The newspaper is now available online and is being published. ”
Mridweeka, who moved to South Korea in 2019 after leaving the institute and currently works for the Korea Astronomy and Space Science Institute, said
TOI
, “SN 2015dj is a type of Ib supernova whose ancestor was in a binary system with a mass between 13 and 20 M_sun. The explosion geometry was symmetrical for this supernova. The team’s discovery and detailed study was recently published in ‘The Astrophysical Journal‘.
Supernovae (SNs) are very energetic explosions in the universe that release an enormous amount of energy. Long-term monitoring of these transitions provides the door to understand the nature of the exploding star as well as the explosive properties. It can also help you pick up the number of massive stars.
Long-term monitoring of these transitions provides the door to understand the nature of the exploding star as well as the explosive properties. It can also help you pick up the number of massive stars.