Binary comb models for FRB 121102

Understand

The first repeating fast radio burst source, FRB 121102, is observed to emit bursts periodically.

• We show that FRB 121102 can be interpreted as an interacting neutron star binary system with an orbital period of 159 days.
• We develop a binary comb model by introducing an eccentricity in the orbit.
• Besides the original funnel mode of the binary comb model, which was applied to FRB 180916.J0158+65 by Ioka and Zhang 2020, we also identify two new modes of the binary comb model, i.e.