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

How are neuton stars intensly magnetic?

  1. Oct 24, 2013 #1
    Neutrons are neutral (obviously). I thought only charged particles could be magnetic. So how are neutron stars magnetic? Thanks for any help.
     
  2. jcsd
  3. Oct 24, 2013 #2

    Vanadium 50

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor
    2015 Award

    Why would you think such a thing? Are your refrigerator magnets charged?
     
  4. Oct 24, 2013 #3
    I mean they have charged particles. neutronium is not just quasi-neutral. Its completely neutral. Or is magnetism solely dependent on spin?
     
  5. Oct 24, 2013 #4

    mfb

    User Avatar
    Insights Author
    2015 Award

    Staff: Mentor

    Neutrons are made out of quarks (and gluons), and quarks are charged.
    In addition, neutron stars are not 100% neutrons.
     
  6. Oct 24, 2013 #5

    Vanadium 50

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor
    2015 Award

    But lets go back to the fundamental misunderstanding. Where do you get this idea of "quasi-neutral" from? Did you read it in a textbook?
     
  7. Oct 24, 2013 #6
    Neutron star crusts are of iron and stuff like that. The cores are a few percent electrons/protons, so neutron star cores are very dense with charge carriers. One or the other of these phases might have the highest density of charge carriers in the universe.
     
  8. Oct 24, 2013 #7
    Sorry I know quasi neutral means something else.
     
  9. Oct 25, 2013 #8

    TumblingDice

    User Avatar
    Gold Member

    Neutron star composition

    http:// upload.wikimedia.org/wikipedia/commons/thumb/9/9e/Neutron_star_cross_section.svg/640px-Neutron_star_cross_section.svg.png

    Image from:
    en.wikipedia.org/wiki/Neutron_star
     
    Last edited: Oct 25, 2013
  10. Oct 25, 2013 #9
    Neutron star cores are superconducting, by the way. The crusts are extremely conductive as well, so neutron stars are extremely good for supporting a magnetic field.
     
    Last edited: Oct 25, 2013
  11. Oct 25, 2013 #10
    Yes, but that's true of all insulators except empty space.
     
  12. Oct 27, 2013 #11

    mfb

    User Avatar
    Insights Author
    2015 Award

    Staff: Mentor

    And all insulators react to magnetic fields. Usually via diamagnetism. The interaction is often weak as the density is low (compared to neutron star material).
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: How are neuton stars intensly magnetic?
Loading...