Mysterious Magnetars: Maximum Stars

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Magnetars are exceptional neutron stars with the highest magnetic

fields ( 10^15 gauss) in the universe, an unusual quasi steady X

radiation (10^35 ergs/sec) and also produce flares which are some of

the brightest events (10^46 ergs in one fifth of a second) to be

recorded. There is no satisfactory model of magnetars.

The talk will cover neutron stars and a new model for the origin of

the magnetic fields in which magnetars arise from a high baryon

density ( phase transition) magnetized core which forms when they are

born. The core magnetic field is initially shielded by the ambient

high conductivity plasma. With time the shielding currents dissipate

transporting the core field out, first to the crust and then breaking

through the crust to the surface of the star. Recent observations

provide support for this model which accounts for several properties

of magnetars and also enables us to identify new magnetars.