Speaker: Dr. Andrei Igoshev (School of Mathematics, Statistics and Physics, Newcastle University, Newcastle upon Tyne, UK)

Title: Magnetic fields of neutron stars: simulations and observations

Abstract:
Neutron stars are the largest and the strongest magnets in the Universe. Their typical radius is around 10 km and their magnetic fields could reach values of 1e15 G. Structurally, the outer 1 km shell of a neutron star is its solid crust, while the inner part is its core. Magnetic fields shape observational properties of isolated and accreting neutron stars. Strong magnetic fields play a crucial role in explaining transient and persistent X-ray emission from Anomalous X-ray Pulsars and Soft Gamma Repeaters jointly known as magnetars. Magnetic fields are not constant and expected to evolve over time. In recent years, a significant progress was made in modelling magneto-thermal evolution of neutron star crust. Ohmic decay and Hall evolution explains multiple magnetar properties.  In this seminar, I summarise the main observational constraints currently available on magnetic fields of neutron stars and confront them with state-of-art numerical simulations. I will explain how current and future observations help us to learn more about magnetic field evolution and its structure. I also explain how the neutron star core can be modelled and show preliminary results for field evolution in the core.

Zoom link:
https://huji.zoom.us/j/84387749650?pwd=gViZLuRpFYvkhN42JatgRJHGkCOnFH.1
Meeting ID: 843 8774 9650
Passcode: 129907
 
Contact: Dima Ofengeim