MAGNETOESTRELLA It is a celestial body that has died as a star and that its residues are of enormous density. They are the result of a supernova that explodes and implodes increasing its gravity greatly attracting other bodies to its nucleus, which can come to weigh like a mountain per cubic cm. Death leads to them being invisible as there is no light emission, but if of X-rays and high-energy gamma rays. Some neutron stars, radio-pulse calls emit radio waves with predictable frequencies and are called pulsars. When it exceeds a certain level they become magnetars or magnetostars. For reasons unknown they go through periods of low and high magnetic intensity emitting huge amounts of energy easily detectable on Earth. They have a very short average life, of around 10. 000 earth years. In recent years scientists have questioned these premises and think that pulsars become magnetars and vice versa.
Magneto star : From Wikipedia : A magnetostar is a type of neutron star powered by an extremely strong magnetic field. It is a variety of pulsars whose main characteristic is ejection, in a short period (equivalent to the duration of a lightning bolt), of huge amounts of high energy in the form of X-rays and gamma rays. The magnetic field impairs the emission power of high-energy electromagnetic radiation, mainly X-rays and gamma rays.
