Archivi tag: SGRs

What powers Anomalous X-ray Pulsars and Soft Gamma-ray Repeaters?

Anomalous X-ray Pulsars (AXPs) and Soft Gamma-ray Repeaters (SGRs) are young, isolated neutron stars, which emit bright bursts of hard X-rays and, more rarely, exceptionally energetic giant flares. They are believed to have strong external magnetic fields of the order of 1014 – 1015G, reaching even higher values in their interior, and are known as magnetars. In this picture, both the steady-state X-ray flux and the emission of bursts/flares are thought to be powered by the reservoir of magnetic energy stored in the star’s interior.  Continua a leggere What powers Anomalous X-ray Pulsars and Soft Gamma-ray Repeaters?