Pulsar surge in the final stage of the life cycle

Pulsar surge in the final stage of the life cycle

Neutron star density attracts matter from neighbor

Scientists from the University of Southampton have noticed that a unique neutron star, stealing matter from its nearest stellar neighbor, can be a slow “transitional pulsar”. This is a rare class of neutron stars that alternate the release of X-rays and radio pulsations.

It is about GRO J1744-28, collecting matter from a nearby giant star. Archival data from the NASA RXTE orbital observatory, which returned to Earth on April 30, showed that the magnetic field of a possible transient pulsar can exceed 100 in all known ones.

In a transitional pulsar, a neutron star pulls matter from the surface of a neighboring solar one. This stream of stellar matter rotates a neutron star, like an engine, and brings up to a hundred revolutions per second. The friction forces in this stream also heat it to millions of degrees, which is why it starts to glow brightly in X-rays. It is believed that at the end of this process, the stream can sometimes be switched on and off, causing the x-rays to be slowly sprayed. Even if a stream is present, it ceases to be smooth and is constantly torn between the gas and the magnetic field. There are peculiar "hiccups", which act as a signal sign of this kind of objects.

But GRO J1744-28 is considered unusual. The neutron star, pulled out for 20 km, performs only 2 revolutions per second, which is 100 times slower than the transient pulsars found before. This indicates a lack of data on the evolution of incredibly dense stars. In addition, there is a powerful magnetic field exceeding the earth's 100 billion times.

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