Statistics of Magnetar Crusts Magnetoemission

V N Kondratyev,Yu V Korovina,V Greco,C Spitaleri,M La Cognata,S Pirrone,F Rizzo

doi:10.1051/epjconf/201611709014

Abstract

Soft repeating gamma-ray (SGR) bursts are considered as magnetoemission of crusts of magnetars (ultranamagnetized neutron stars). It is shown that all the SGR burst observations can be described and systematized within randomly jumping interacting moments model including quantum fluctuations and internuclear magnetic interaction in an inhomogeneous crusty nuclear matter.

Highlights

The pioneering evidence for ultramagnetized astrophysical objects is associated with the March 5, 1979 event from Soft repeating gamma-ray (SGR) 0526-66 [1]
Taking for magnetic coupling strength between nearest-neighbor elements the value J total Hamiltonian H for atomic nuclei array in a field H can be expressed as follows H = − i bimi through an interaction of magnetic moment mi with a local field bi = H(t) + J j=nn +hi
We considered magnetodynamics of inhomogeneous crusty nuclear matter

Summary

Introduction

The pioneering evidence for ultramagnetized astrophysical objects (magnetars) is associated with the March 5, 1979 event from SGR 0526-66 [1]. The magnetar concept, see [2,3], is strongly corroborated by further observations of soft gamma repeaters (SGRs) indicating significant multipole magnetic fields being substantially larger than the dipole component Bdip ∼ 1015 G. This relation into Eq (1) and integrating over NS crust area we obtain the field strength B ∼ 101.5 teratesla (M/Mo)(10 km/R), with the solar mass Mo. field torroidal components can reach tens teratesla (TT) that is consistent with estimates [4, 5] based on the supernova explosion energy. Field torroidal components can reach tens teratesla (TT) that is consistent with estimates [4, 5] based on the supernova explosion energy Such fields can affect the structure and properties of atomic nuclei [3,4,5]. Model [3] is further extended for an analysis of SGR bursts

Magnetodynamics of crusty nuclear matter

RJIM model for SGR-burst activity

Conclusion