The interplay between accretion disk wind and jet in the neutron-star low-mass X-ray binary GX 13+1

The accretion flows in low-mass X-ray binaries (LMXBs) are commonly accompanied by jet outflows or disk winds. Dedicated studies of LMXBs with luminosities up to ~20% Eddington suggest that these types of outflows are to a large extent mutually exclusive suggesting accretion disk winds as a possible jet suppression mechanism (e.g. Ponti et al. 2012). However, in a more recent study of near- and super-Eddington LMXBs, Homan et al. (2016) found four sources that show evidence that, at high luminosities, jets and winds might coexist. The presence of jets in these sources is deduced from radio observations, while disk winds are inferred from high-resolution X-ray spectra. The lack of strictly simultaneous observations prevented them from robustly concluding that, in these systems, jet and disk winds are launched at the same time. To explore this scenario further, we present a dedicated multi-wavelength multi-instrument (JVLA, Chandra/HETG, Nicer) campaign of the near-Eddington neutron-star LMXB GX 13+1. The simultaneous radio and (high-resolution) X-ray observations show the presence of a persistent ionised wind and a highly variable jet outflow. This not only verifies the coexistence of the two distinct outflows, but also presents an exclusive opportunity to study the connection between the wind, the jet, and the X-ray continuum components. Based on the results of our multi-wavelength campaign, I will present a new view of the interplay between jets and disk winds at near-Eddington luminosities, providing the implications on the outflow launching mechanisms, and comparing it with the relation observed between accretion disk wind and jet in other bright LMXBs (e.g. the microquasar GRS 1915+105).