Scientists from the Moscow Institute for Physics and Technology, the Pulkovo Observatory, and the Russian Academy of Science have discovered a neutron star. Its magnetic field is apparent only when the star is seen through a certain angle, that’s relative to the observer.
In the past, there was a rule: all neutron stars could be grouped into two prominent families. The first one has objects where the magnetic field manifested itself in the spin cycle, and the other one had objectives where the magnetic field was not measured whatsoever.
Researchers studied the neutron star GRO J2058+42, and it gave us many details about the internal structure of the magnetic field of the neutron star, but only at a particular phase of its rotational period. The study was published in the Astrophysical Journal Letters.
Scientists Spotted A Neutron Star With A Weird Magnetic Field
First, the GRO J2058+42 system was discovered almost a quarter of a century ago, with the CGRO – Compton Gamma-Ray Observatory. It belongs to the class of X-ray pulsars. The object was studied by using all kinds of instruments, but nothing made a difference. The recent observations of the NuSTAR space observatory gave the researchers the ability to find an attractive feature in the pulsar’s emission, which might make it the first object of its own family.
They found a cyclotron absorption line, which was registered in the source energy spectrum. It allows scientists to estimate the strength of the magnetic field of a neutron star. This cyclotron line is not a new thing for us, and it is observed in about 30 X-ray pulsars.
This discovery is unique, and it shows that this line shows itself only when the neutron star is seen, but only under a certain angle to the observer.