12 Mar 2020 space telescope Swift detected a flare in the milky way galaxy. In the course of a week were identified and the recently discovered x-ray source — a rare type of slowly rotating neutron stars. A group of scientists from the Center for advanced technology studies of gravitational waves (OzGrav) has recently found its new properties.
Rotating once every 1.4 seconds is the fastest known rotating magnets and possibly one of the youngest neutron stars in the milky Way. In addition, star Swift J1818.0-1607 emits radio signals, similar to those observed from pulsars, another type of rotating neutron stars. At the time of detection was known, only four other radiopulse of the Magnetar, which makes Swift J1818.0-1607 extremely rare discovery.
Recently, researchers found that the pulses from the Magnetar become weaker when switching from low to high frequencies: it has cool radiospeaker. It radiation not only steeper than the other four radiomagnetic, but ~ 90% of all pulsars. In addition, the researchers found that the Magnetar in just two weeks has become brighter more than 10 times.
For comparison, four other radiomagnit have an almost constant brightness at radio frequencies.
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The young age of the Magnetar, from 240 to 320 years, measured as the period of its rotation, and by how quickly it slows down over time. However, these data are unlikely to be accurate. The deceleration speed of rotation of magnetron varies greatly throughout the year, especially following outbreaks, and may lead to incorrect estimates of age. This is also confirmed by the absence of any supernova remnant in the position of magnetron.
The study’s lead author Marcus lower has proposed a theory that explains the mysterious properties of the Magnetar. Swift J1818.0-1607 could start his life as a normal pulsar, which has received the rotational properties of a Magnetar. This can happen if the magnetic pole and the pole of rotation of the neutron star will quickly aligned, or if the material of a supernova falls back onto the neutron star and bury its magnetic field.
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Then the hidden magnetic field will slowly float back to the surface for thousands of years. To test these theories will require an ongoing monitoring Swift J1818.0-1607 for many months or years.