EXPLOSION MECHANISM OF SUPERNOVA (SPACE SCIENCE)
SPACE SCIENCE (PIB)
Explosion mechanism of supernovae
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Study by Indian Astronomers provides clues to explosion mechanism of supernovae (April 28, 2021)
- A team of Indian astronomers observed distant supernovae, and narrowed down the possible mechanisms of explosion of such supernovae which provide key measures of cosmological distances.
- The study was on a supernova called SN 2017hpa, a particular type of supernovae called Ia supernova, which exploded in 2017 helped narrow down the mechanism of the supernovae explosion by observations of unburned carbon in the early phase spectra.
- (2011) Nobel Prize was awarded to three scientists for discovery of Universe expanding at an ever-accelerating rate through observations of distant supernovae.
- Supernova is the explosive death of a star the most spectacular and catastrophic events in the Universe ever to human eyes.
- Type Ia supernovae are the result of explosions of white dwarfs that exceed their mass beyond the Chandrasekhar limit through accretion of matter.
- Most SNeIa are of Homogeneous nature; makes them extremely good standards to measure cosmological distances. But a good fraction of these events show diversity in both their light curve as well as spectral properties.
- The explosion mechanisms which create these supernovae (SNe), and the exact nature of their progenitor systems (star which is at the origin of a supernova phenomenon) are not clearly understood.
|Fig.2 Early (pre-maximum) phase spectra of supernova SN 2017hpa obtained using the 2m Himalayan Chandra Telescope, IAO, Hanle. The spectral feature at 6580 A due to unburned carbon is marked in the spectrum.|
Source: Press Information Bureau
source of featured image: forbes