The braking index of millisecond magnetars

Paul D. Lasky, Cristiano Leris, Antonia Rowlinson +1

We make the first measurement of the braking index $n$ of two putative millisecond magnetars born in short gamma-ray bursts. We measure $n=2.9\pm 0.1$ and $n=2.6\pm 0.1$ for millisec…