Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Seismic Stars

  1. Aug 7, 2004 #1
    When in a supernova a star collapses to a neutron star, its magnetic field increases dramatically in strength. Duncan and Thompson calculated that the magnetic field of a neutron star, normally an already enormous 10^12 tesla could under certain circumstances grow even larger, to about 10^15 tesla. Such a highly magnetic neutron star is called a magnetar.

    In the outer layers of a magnetar, which consist of a plasma of heavy elements (mostly iron), this causes tension which leads to 'starquakes'. These seismic vibrations are extremely energetic, and result in a burst of X-ray and gamma ray radiation. To astronomers, such an object is known as a soft gamma repeater.

    It is estimated that about 1 in 10 supernova explosions results in a magnetar rather than a more standard neutron star or pulsar.

    The energy of these explosions slows the rotation (causing magnetars to rotate much more slowly than other neutron stars of a similar age) and lessens the electric field, and after only about 10,000 years the starquakes are over.

    Reference:
    http://www.wordiq.com/definition/Magnetar
    http://science.nasa.gov/newhome/headlines/mag_pix/TV-graphics/xsection.tnl.jpg
    http://science.nasa.gov/newhome/headlines/mag_pix/TV-graphics/xsection.jpg
    http://science.nasa.gov/newhome/headlines/ast20may98_1.htm
    http://science.nasa.gov/newhome/headlines/ast29sep98_1.htm
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?
Draft saved Draft deleted



Similar Discussions: Seismic Stars
  1. No star (Replies: 1)

  2. Strange Stars (Replies: 6)

Loading...