Scientists discover dramatic flares bursts
Andhra Pradesh ~ India ~ International ~ City ~ Entertainment ~ Business ~ Sports ~ Technology ~ Health ~ Features
Twitter ~ Facebook
Home / Technology News / 2010 / October 2010 / October 15, 2010
Scientists discover 'dramatic flares, bursts from mysterious pulsar'
RSS / Print / Comments

University College London

Scientists discover 'dramatic flares, bursts from mysterious pulsar'

Paralysed patient becomes world's first to get stem cell therapy

Foetus captured on film smiling at just 17 weeks

More on University College London


Fujitsu Develops Technology to Enhance Comprehensive Testing of Java Programs

Student-to-student interaction will help build Indo-Pak relationship

Moon may get nuclear energy soon

More on NASA

Technology News

Cheap, solar-powered lamp 'most important object of the 21st century'
A cheap solar-powered lamp has joined the list of the most priceless treasures in the British Museum. ANI

Worms provide clues to declining fertility with age in women
A new study from Princeton University has revealed why fertility declines at a rate that far exceeds the onset of other aging signs in women. ANI

Flapless 'Demon' aircraft that use air bursts to fly
Engineers at the Cranfield University in the United Kingdom have completed a flapless flight by using bursts of air to control an unmanned aerial vehicle (UAV) they call Demon. ANI

Scientists discover 'dramatic flares, bursts from mysterious pulsar'

Scientists have discovered dramatic flares and bursts of energy emanating from a weakly magnetised, slowly rotating pulsar.

Washington, Oct 15 : Scientists have discovered dramatic flares and bursts of energy emanating from a weakly magnetised, slowly rotating pulsar.

The international team of astrophysicists who made the discovery believes that the source of the pulsar's power may be hidden deep within its surface.

Pulsars, or neutron stars, are the collapsed remains of massive stars. Although they are on average only about 30km in diameter, they have hugely powerful surface magnetic fields, billions of times that of our Sun.

The most extreme kinds of pulsars have a surface magnetic field 50-1000 times stronger than normal and emit powerful flares of gamma rays and X-rays. Named magnetars (which stands for "magnetic stars") by astronomers, their huge magnetic fields are thought to be the ultimate source of power for the bursts of gamma rays.

Theoretical studies indicate that in magnetars the internal field is actually stronger than the surface field, a property that can deform the crust and propagate outwards. The decay of the magnetic field leads to the production of steady and bursting X-ray emission through the heating of the neutron star crust or the acceleration of particles.

Now the research suggests that the same power source can also work for weaker, non-magnetar, pulsars. The observations, which were made by NASA's Chandra and Swift X-ray observatories of the neutron star SGR 0418, may indicate the presence of a huge internal magnetic field in these seemingly less powerful pulsars, which is not matched by their surface magnetic field.

"We have now discovered bursts and flares, i.e. magnetar-like activity, from a new pulsar whose magnetic field is very low," said Dr Silvia Zane, from UCL's (University College London) Mullard Space Science Laboratory.

The research has been published in Science.


Link to this page

Suggested pages for your additional reading on Facebook

© 2000-2017 All Rights Reserved and are of their respective owners.
Disclaimer, Terms of Service & Privacy Policy | Contact Us