Periodicity in fast radio bursts due to forced precession by a fallback disk

Understand

Recently, a 16-day periodicity in one fast radio burst is reported.

• We propose that this 16-day periodicity may be due to forced precession of the neutron star by a fallback disk.
• When the rotation axis is misaligned with the normal direction of the disk plane, the neutron star will precess.
• The eccentricity of the neutron star may be due to rotation or strong magnetic field etc.