• Sep 16 2014

    Dr Jacobus Diener (NITheP Stellenbosch Node)

    Good morning All,

    The National Institute for Theoretical Physics, and the Centre for Theoretical Physics, School of Physics, would like to invite to its coming talk in the theoretical physics seminar series, entitled:

    "The properties of magnetized nuclear matter and its influence on the behaviour of neutron stars"

    to be presented by Dr. Jacobus Diener (NITheP/Stellenbosch)

    Abstract: Neutron stars are remnants of exploded massive stars. Compressed by gravity and stabilized by the nuclear degeneracy pressure, these stars are the densest stable states of matter that can be directly observed.

    The inferred surface magnetic fields of some neutron stars are between 1014 and 1015 gauss. However, the magnetic field in the interior of the star is expected to be much stronger and could increase by about three orders of magnitude. If changes in the star’s magnetic field influence its interior composition, it could also alter its global properties. Since the star is expected to consist partially out of cold, saturated nuclear matter this type of matter’s behaviour in very strong magnetic field could pertain to some of the observed neutron star phenomena.

    In this talk I will discuss the properties of strongly magnetized symmetric and charge neutral beta-equilibrated nuclear matter as well as the possibility of a ferromagnetic phase transition in nuclear matter. Based on these discussions I will speculate on the impact that sudden changes in the neutron star’s magnetic field might have on the star’s moment of inertia as well as some of its other observable properties.

    Dates: Tuesday, 16th September 2014
    Venue: Frank Nabarro Lecture Theatre P216
    Time: 13.20 - 14.10

    I hope you shall all be able to attend,

    Yours sincerely,

    Alan S. Cornell

    School of Physics
    University of the Witwatersrand
    Private Bag 3
    Wits 2050
    South Africa