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The Structure and Signals of Neutron Stars, from Birth to Death

24–28 Mar 2014
Europe/Rome timezone

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Session

Evening session - Parallel A

25 Mar 2014, 17:00

Conveners

Evening session - Parallel A

  • Nicolas Chamel (Universitè Libre de Bruxelles, Belgium)

Presentation materials

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  1. 25. Sound modes and instabilities in a relativistic superfluid
    Andreas Schmitt (Vienna University of Technology)
    25/03/2014, 17:00
    Compact stars are likely to contain superfluid matter, either in the form of nuclear or quark matter, or both. The hydrodynamics of superfluids is usually described in terms of a two-fluid model. I will discuss how such a two-fluid model can be derived from field theory and apply the results to compute the properties of first and second sound for arbitrary temperatures and (uniform) superfluid...
  2. 109. Effects of the symmetry energy in core-collapse supernovae
    Matthias Hempel (B)
    25/03/2014, 17:20
    This presentation discusses the role of the equation of state (EOS) in core-collapse supernovae, with focus on the nuclear symmetry energy. First we review the extended set of supernova EOS which we have developed recently and compare their characteristic properties with experimental constraints. The new EOSs are then applied in hydrodynamical simulations with detailed neutrino transport,...
  3. 106. The equation of state from chiral forces in the Green's functions approach
    Dr Arnau Rios Huguet (University of Surrey)
    25/03/2014, 17:40
    The equation of state of neutron matter is a basic ingredient in the theoretical understanding of neutron stars. From a nuclear theory perspective, the problem has two major sources of uncertainty: the nuclear hamiltonian and the treatment of quantum many-body correlations. I will review a series of recent theoretical advances within the many-body Green's functions approach that help tackle...
  4. 139. Numerical studies of the dynamical bar-mode instability in rapidly rotating relativistic stars
    Dr Luca Franci (Università di Parma)
    25/03/2014, 18:00
    We present numerical results on the dynamical bar-mode (m=2) instability in differentially rotating relativistic star models with a polytropic EoS, obtained by means of full 3D ideal magneto-hydrodynamics simulations in full General Relativity. We focus our attention on two different ingredients that may affect the onset and the dynamics of the instability, i.e., the magnetization...
  5. 110. Neutron star metamorphosis: from sub-luminous accretion to rotation-powered quiescence
    Manuel Linares (I)
    25/03/2014, 18:15
    The X-ray transient IGR J18245-2452 contains the first neutron star (NS) seen to switch between rotation-powered and accretion-powered pulsations. We present Swift and Chandra observations that reveal a spectral transition when the X-ray luminosity was as low as 0.01% of the Eddington limit. We also find a striking variability pattern in the 2008 quiescent Chandra light curves: rapid switches...
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