SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 19: Nuclear Astrophysics II
HK 19.4: Vortrag
Dienstag, 21. März 2023, 18:00–18:15, SCH/A419
Magnetar crusts - influence of the magnetic field on the composition and the unified equation of state — •Yuliya Mutafchieva1, Zhivko Stoyanov1, Nicolas Chamel2, John Michael Pearson3, and Lyubomir Mihailov4 — 1Institute For Nuclear Research And Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria — 2Institute of Astronomy and Astrophysics, Universite Libre de Bruxelles, Brussels, Belgium — 3Departement de Physique, Universite de Montreal, Montreal, Canada — 4Institute of Solid State Physics, Bulgarian Academy of Sciences, Sofia, Bulgaria
At the end point of stellar evolution, strongly magnetised neutron stars - magnetars, are not only among the most compact stars in the universe, but also the strongest magnets. These conditions can significantly alter the properties of the outermost regions of a neutron star. We have recently studied the influence of a very strong magnetic field on the equilibrium properties of magnetar crusts when taking into account the Landau-Rabi quantization of electron motion. Both the outer and inner regions of the crust are treated consistently within the framework of the nuclear-energy density functional theory, thus allowing us to calculate their composition and their equation of state in a unified way. Our study covers a wide range of magnetic-field strengths necessary for modelling astrophysical phenomena. Results using accurately calibrated Brussels-Montreal nuclear energy density functionals, which were constructed from generalized Skyrme effective nucleon-nucleon interactions, will be presented.