Ulrich Geppert

TL;DR: The cooling of a compact star depends very sensitively on the state of matter at supranuclear densities, which essentially controls the neutrino emission, as well as on the structure of the stellar outer layers which control the photon emission as mentioned in this paper.

TL;DR: In this article, the authors studied the mutual influence of thermal and magnetic evoluti on in a neutron star's crust in axial symmetry, and showed that the feedback between Joule heating and magnetic diffusion is strong, resulting in a faster dissipation of the stronger fields during the first 10 5 − 10 6 years of a star's life.

TL;DR: In this article, the authors studied the non-linear evolution of magnetic fields in neutron star crusts with special attention to the influence of the Hall drift, and they showed that Ohmic dissipation influenced by Hall drift takes place in the inner crust of a neutron star on a timescale of 10 6 years.

TL;DR: In this article, a more detailed analysis revealed that the circulation speed in a pure vacuum gap is too high when compared with observations, and some pul- sars demonstrate significant time variations of the drift rate, including a change of the apparent drift direction.

TL;DR: It is argued that, if the AXPs are interpreted as magnetars, their clustering of spin periods between 6 and 12 s, their period derivatives, their thermal X-ray luminosities, and the association of two of them with young supernova remnants can only be understood globally if the magnetic field in magnetars decays significantly on a timescale of the order of 104 yr.