http://arxiv.org/abs/2004.11223
We propose a geometrical explanation about neutron star (NS)-companion system in order to explain the periodically and nonperiodicly repeating fast radio bursts (FRBs). We propose that there is a critical binary separation $r_{\rm c}$ under which the interaction between the NS and its companion can trigger FRBs. If the maximum and minimum binary separation of elliptic orbit, i.e., $r_{\rm max}$ and $r_{\rm min}$, satisfy $r_{\rm max}>r_{\rm c}>r_{\rm min}$, the orbital motion of the binary can induce periodicly FRBs, and the interaction between the NS and companion when they get close enough in their elliptic orbit will result an active period of periodicly FRBs. If the maximum binary separation $r_{\rm max}<r_{\rm c}$, the modulation of orbital motion will not work since the interaction is always there, such that a repeating FRB can be nonperiodic.
S. Du and R. Xu
Fri, 24 Apr 20
44/63
Comments: 4 pages, 2 figures
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