The patient waiting of astronomers is finally over as they have seen the rarest star that has awakened from its slumber and has started emitting a fresh stream of radio waves once again. This most extraordinary star known as XTE J1810–197 is one of the four radio magnetars that were first seen in 2004. It has become dormant in 2008 and woke up again in Dec 2018 with slight changes as observed by research scientists from Max-Planck-Institut fur Radioastronomie and University of Manchester. The pulse variations as seen now are less dramatic and gentler than what was seen in 2006. It is now splitting electromagnetic radiations of low energy in every 5.5 seconds.
Magnetars are dead stars which have powerful radio waves for reasons that are beyond understanding. They can generate magnetic fields that are one quadrillion times powerful than that of the earth which is quite odd. The cause of such powerful magnetism is still a mystery, but theories suggest that it can start when a neutron star turns into a pulsar while spinning at 100 to 1000 times per second.
This star belongs to an exclusive class thereby blurring the difference between itself and garden variety pulsars. As per the speculations, maybe all the magnetars can produce radio waves in similar fashion, and we have seen only a few. Alternatively, perhaps XTE J1810–197 is somewhat unique than the other three radio-emitting magnetars that were observed before. As per the new study, there is a possibility that tremors in the crust area of the star not only realign their magnetic field but also contribute to the electromagnetic frequency range that also includes radio waves.
There is a need to carry out a further observation to whittle away the speculations. Now as the monster has woken up again, the astronomers have a chance to carry out their views to say more about it.