Age open in March 2020 radiogramme the Magnetar Swift J1818.0-1607 estimated at 240 years old — is the youngest source of this type in the Galaxy. About it writes a team of astronomers in the paper on arXiv.org.
Magniture called a neutron star with an extremely strong magnetic field. It is believed that they are formed from stars with initial mass of about 40 masses of the Sun and live long — up to a million years. During this time, the magnetic field weakens and then terminated, and x-rays. Still in the milky Way was known four Magnetar, however, more recently, in March 2020, the orbital Observatory Swift detected a burst of hard x-rays and long-lived the flash at a distance of 4.8 kiloparsec. Subsequent observations confirmed the radio pulsation with a period of 1.36 seconds. The source, called Swift J1818.0-1607, was recognized as the fifth Magnetar in the Galaxy.
The astronomer Paolo Esposito (Paolo Esposito) from the Institute of astrophysics and physics of space in Milan and his colleagues from Britain, Germany, Spain, Italy, USA and France analyzed data from observations of Swift J1818.0-1607 in different ranges, estimated the magnetic field strength of the source, its luminosity and the slow rotation. This allowed them to determine the so-called intrinsic age of a Magnetar, which can be calculated by dividing the period of ripple at twice the deceleration. It was only 240 years, making Swift J1818.0-1607 the young Magnetar in this Galaxy.
Moreover, it was found that recently opened a Magnetar can be attributed to ratiograstim source — observation on the radio telescope Sardinia (Sardinia Radio Telescope) recorded strong and short ripple at the frequency of 1.5 Hz in addition to the normal radiation. Scientists conclude that Swift J1818.0-607 — unusual Magnetar belonging to a small and heterogeneous group of young neutron stars, properties of which combine rapid rotation and strong magnetic field.
The presence of the Magnetar can specify fast radio bursts, we wrote about how artificial intelligence helps to record such events. In addition, we talked about the flash itself is far gipernovae at a distance of more than 10 billion light-years, which may have formed rapidly rotating Magnetar.