According to recent research from the University of Bath in the UK, newborn supramassive stars, rather than black holes, may be the cause of gamma-ray bursts. Satellites orbiting Earth have detected Gamma-ray bursts (GRBs) as luminous flashes of extremely energetic gamma-ray radiation that last f
An artist’s impression of a gamma-ray burst powered by a neutron star. Credit: Nuria Jordana-Mitjans
A type of GRB called a short-duration GRB is produced when two neutron stars collide. These ultra-dense stars, which have the mass of our Sun compressed into a size smaller than a city, generate ripples in space-time calledUntil now, space scientists have largely agreed that the ‘engine’ powering such energetic and short-lived bursts must always come from a newly formed. However, new research by an international team of astrophysicists, led by Dr.
Space scientists are split between two theories. The first theory has it that neutron stars merge to briefly form an extremely massive neutron star, only for this star to then collapse into a black hole in a fraction of a second. The second argues that the two neutron stars would result in a less heavy neutron star with a higher life expectancy.
The electromagnetic signal from the GRB explored for this study made it clear to Dr. Jordana-Mitjans and her collaborators that a neutron star remnant rather than a black hole must have given rise to this burst. “Our discovery opens new hope for upcoming sky surveys with telescopes such as the Rubin Observatory LSST with which we may find signals from hundreds of thousands of such long-lived neutron stars before they collapse to become black holes.”What initially puzzled the researchers was that the optical light from the afterglow that followed GRB 180618A disappeared after just 35 minutes.
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