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Astronomers have discovered a strange star Swift J1818.0-1607 that may be intermediate between the Magnetar and pulsar — two varieties of neutron stars, which are the remnants of dead stars. On the discovery of unusual dead star is reported in the Preprint, published in the repository arXiv.
Swift J1818.0-1607 located at a distance of 13-26 thousand light-years from Earth, was found March 12, 2020 at the registration of flashes of gamma-rays with orbital Observatory Swift. Subsequent observations have detected pulsed x-ray radiation. Two days after the flash was recorded by the radio emission and showed that the source is the fastest rotating pulsar discovered to date. According to preliminary estimates, his age is 240 days, which makes it the youngest known pulsar.
According to the pattern of the emitted radio pulses similar to the pulses with four other well-known radiomagnetic. However, researchers have discovered a rare feature that was not previously observed in objects of this type. During the transition from low to high frequencies revealed a sharp drop in brightness of the radio emission, which is characteristic of pulsars, but not magnitron. In this Swift J1818.0-1607 similar to the pulsar PSR J1119-6127, which indicates a common mechanism for the generation of outbreaks.
Scientists believe that some pulsars may evolve in magniture. Although it is not known exactly how this process occurs, a possible scenario in which rapid deceleration of the rotation speed leads to the manifestation of the properties of Magnetar or neutron star can from the outset to have a magnetic field, which is masked by the falling back material from the supernova.
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