- Gamma-ray explosions are violent explosions released by a dying star.
- A magnetic field ejects from a dying star as it scrambles
- This happens because the field crashes, and tremors, stellar debris
- Gamma-ray bursts were first detected in the 1960s
Astronomers announced earlier this month that they have recorded the largest explosion in the universe and a new study has identified the driving factors behind it and other gamma-ray bursts (GRBs).
A team led by the University of Bath found that the magnetic fields of these giant explosions are devastated when material ejected from a dying star crashes into, and slams, stellar debris.
This was determined when scientists captured the light emitted in 2014 just 90 seconds after GRB 141220A occurred, which is the earliest detected light on record.
“This new study builds on our research that has shown that the most powerful GRBs can be driven by massively ordered magnetic fields, but only the fastest telescopes will catch a glimpse of their distinctive polarization signal before they are lost by the explosion.” ” PhD student Nuria Jordana-Mitzens said Statement.
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A team led by the University of Bath found that the magnetic fields in these giant explosions cause material ejected from a dying star to crash and scramble, followed by stellar debris.
GRBs were first discovered in the 1960s and have since baffled scientists around the world – but have also begun a quest to find the causes of these violent explosions.
When stars or black holes die, they eject material at velocities close to the speed of light, and emit powerful bright, short-lived gamma-ray flashes that can be detected by Earth-orbiting satellites.
Magnetic fields are not observed directly, but telescopes Like Hubble? Pick up a signature that is encoded in the light produced by charged particles, or electrons, which move around magnetic field lines.
And telescopes attached to Earth capture this light, which has traveled across the universe for millions of years.
It was determined in 2014 after scientists captured the light emitted exactly 90 seconds after GRB 141220A occurred, which was the first detected on record.
Head of Astrophysics at Bath and gamma-ray specialist Professor Carol Mundell said: ‘We measured a particular property of light – polarization – to directly investigate the physical properties of the magnetic field powering the explosion.
Gamma-ray bursts are the most violent explosions in the universe
Gamma ray bursts (GRBs), energetic jets of gamma rays coming from black holes, can be created in two different ways – resulting in long or short GRBs.
They are created from some of the most violent deaths in the universe.
Long GRBs last about a minute, and scientists think they are produced by supernovae: when the core of a massive star collapses to become a black hole.
Small GRBs last up to a second and are produced when two neutron stars merge.
‘This is a great result and solves a long-standing puzzle of these extreme cosmic explosions – a puzzle I have been studying for a long time.’
Magnetic fields are originally predicted to form neatly and in polarized patterns, But further shocks collide with the debris that shatters the star that went into the supernova, a process that occurs when stars die.
Afterwards, the light must be mostly depolarized as the field is scrambled in the collision.
Mundell’s team was the first to discover highly polarized light minutes after the explosion that confirmed the presence of primary regions with large-scale structure. But the detail picture of further aftershocks has proved more controversial.
This is because previous work has observed GRBs only in the hours to days after the eruption when magnetic fields are long gone.
‘These rare observations were difficult to compare, because they examined very different times and physics. There was no way to reconcile them in the Standard Model,’ Jordana-Mitzen said.
On June 3, experts at the German Electron Synchrotron in Hamburg announced the detection of a giant gamma-ray burst about six trillion miles from Earth—more than a billion light-years away.
The explosive event was the beginning of the death of a star and its transformation into a black hole.
According to German researchers, despite being a billion light years away from Earth, it is believed to be within our ‘cosmic backyard’.
It comes from the constellation of Eridanus, which was discovered by the Greek astronomer Claudius Ptolemy in the 2nd century.
it was The most energetic radiation and with the longest gamma-ray burst of any so far discovered, say the German team observing it.
The last gamma-ray burst has been on average 20 billion light years away.
The burst named GRB 190829A was first detected on 29 August 2019.
“Observations with HESS challenge the established idea of how gamma-rays are produced in these massive stellar explosions,” the team said in a statement. Statement.
Dr. Andrew Taylor of the German Electron Synchrotron (DESY), co-author of the above, said they were ‘in the front row’ when the gamma-ray burst occurred.
The DESY scientist explained, ‘We can see more unprecedented gamma-ray energies for several days.
A supernova occurs when a giant star explodes
A supernova occurs when a star explodes, dropping debris and particles into space.
A supernova only burns for a short time, but it can tell scientists a lot about the beginning of the universe.
A one-of-a-kind supernova has shown scientists that we live in an expanding universe, which is expanding at an ever-increasing rate.
Scientists have also determined that supernovae play an important role in distributing elements throughout the universe.
In 1987, astronomers observed a ‘Titanic supernova’ in a nearby galaxy, blazing with the power of more than 100 million suns (pictured)