Nasa’s Hubble captures ‘beating heart’ of supernova Crab Nebula
Crab Nebula is the most historic and intensively studied remnants of a supernova, an exploding star.world Updated: Jul 10, 2016 14:05 IST
Nasa’s Hubble Space Telescope has imaged the supernova Crab Nebula’s ‘beating heart’, an inner region that sends out pulses of radiation and tsunamis of charged particles.
Crab Nebula is the most historic and intensively studied remnants of a supernova, an exploding star.
The neutron star at the very centre of the Crab Nebula has about the same mass as the Sun but compressed into an incredibly dense sphere that is only a few miles across.
Spinning 30 times a second, the neutron star shoots out detectable beams of energy that make it look like it’s pulsating.
The Hubble Space Telescope image is centred on the region around the neutron star and the expanding, tattered, filamentary debris surrounding it.
Hubble’s sharp view captures the intricate details of glowing gas, shown in red, that forms a swirling medley of cavities and filaments.
Inside this shell is a ghostly blue glow that is radiation given off by electrons spiralling at nearly the speed of light in the powerful magnetic field around the crushed stellar core.
The neutron star is a showcase for extreme physical processes and unimaginable cosmic violence.
Bright wisps are moving outward from the neutron star at half the speed of light to form an expanding ring. It is thought that these wisps originate from a shock wave that turns the high-speed wind from the neutron star into extremely energetic particles.
When this “heartbeat” radiation signature was first discovered in 1968, astronomers believed they had discovered a new type of astronomical object.
Now astronomers know it is the archetype of a class of supernova remnants called pulsars - or rapidly spinning neutron stars.
These interstellar “lighthouse beacons” are invaluable for doing observational experiments on a variety of astronomical phenomena, including measuring gravity waves, Nasa said.
Observations of the Crab supernova were recorded by Chinese astronomers in 1054 AD. The nebula, bright enough to be visible in amateur telescopes, is located 6,500 light-years away in the constellation Taurus.
First Published: Jul 10, 2016 14:05 IST