A new radio census of neutron star X-ray binaries

We report new radio observations of a sample thirty-six neutron star (NS) X-ray binaries, more than doubling the in literature observed at current-day sensitivities. These sources include thirteen weakly-magnetised ($B<10^{10}$ G) and twenty-three strongly-magnetised ($B\geq10^{10}$ NSs. Sixteen latter category reside high-mass which only two systems were radio-detected previously. detect four weakly nine NSs; are systematically fainter former do not exceed $L_R \approx 3\times10^{28}$ erg/s. In turn, we confirm earlier finding that weakly-magnetized NSs typically accreting stellar-mass black holes. While an unambiguous identification origin emission binaries is challenging, find all but detected (Vela X-1 4U 1700-37) appears likely attributable to jet donor wind. The NS does reveal global correlation between luminosity, may be result sensitivity limits. Furthermore, discuss effect spin magnetic field on luminosity power our sample. No current model can account for properties, necessitating development refinement models strengths up $10^{13}$ G. Finally, quenching soft states low-mass non-detections very-faint sample, future campaigns