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Science & Tech.
Pradeep Kumar

01/07/21 11:45 AM IST

Probing stellar evolution

In news

Rebel behavior of highest energy afterglow of a Gamma-Ray Burst detected in space may help probe stellar evolution

Highlights
  • The emission from the most notable Gamma-Ray Burst (GRB) explosion so far traced -- the afterglow from a galaxy 4.5 billion light-years away was found to be complex in nature and did not follow the evolution expected in standard afterglow models.
  • The detection of high energy photons (TeV Photons) from this GRB provides new insights and important clues to unravel the underlying physical processes at work which result in such explosions.
  • The GRB with ultra-high energy photons called GRB 190114C was detected for the first time on 14-January-2019.
  • The optical observations of the afterglow from GRB 190114C were carried out with the Growth India Telescope (GIT), Himalayan Chandra Telescope (HCT)
  • Detailed modeling of the afterglow using multi-band data indicates that the parameters describing the fraction of energy in electron population and magnetic field are evolving with time and not constant as generally seen in GRBs.
  • The scientists suggested that the evolution of these parameters, at early times, may play a role in producing the bright TeV emission.
Source: PIB

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