One of the most interesting stars in the Milky Way is still serving up more than its fair share of intrigue.
Neutron stars are already extreme: the ultra-dense cores of massive stars that have gone supernova, blasting off their outer material while the remaining heart of the star collapses under gravity to a sphere packing the mass of up to around 2.4 Suns into a diameter of around 20 kilometers .
But more information was needed, so SGR 1935+2154 remained under close surveillance. Then, in October 2020, it wasAnd now, a research team led by astrophysicist George Younes of George Washington University have found that just a few days prior to that activity, it did something really weird: it suddenly slowed down.glitchA neutron star glitch is usually a sudden acceleration in the rotation speed. A slowdown, sometimes known as an anti-glitch, is much rarer.
So, the researchers decided to investigate what could have caused it – and what role, if any, the anti-glitch could have played in generating the radio burst activity detected a few days later.
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