Explanation of Detailed Spectral Properties of FRBs by Axion Star Model

Understand

We have proposed a generation mechanism of non repeating ( repeating ) fast radio bursts: They arise by axion star collisions with neutron stars ( accretion disks of galactic black holes ).

• The axion star as coherent state of axions with mass $m_a$ generates homogeneous electric field oscillating with frequency $m_a/2\pi$ under strong magnetic fields.
• The field makes electrons coherently oscillate and emit the coherent dipole radiations ( FRBs ).
• The radiations stop when thermal fluctuations produced by the oscillation disturb the coherent oscillations.