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We report on a comprehensive multi-wavelength study of the pulsars in theglobular cluster (GC) M5, including the discovery of M5G, a new compactnon-eclipsing "black widow" pulsar. Thanks to the analysis of 34 years of radiodata taken with the FAST and Arecibo telescopes, we obtained newphase-connected timing solutions for four pulsars in the clusters and improvedthose of the other three known pulsars. These have resulted in, among otherthings: a) much improved proper motions for five pulsars, with transversevelocities that are smaller than their respective escape velocities; b) 3-sigmaand 1.5-sigma detections of Shapiro delays in M5F and M5D, respectively; c)greatly improved measurement of the periastron advance in M5B, whose value of0.01361(6) implies that M5B is still likely to be a heavy neutron star. Thebinary pulsars M5D, E and F are confirmed to be in low-eccentricity binarysystems, the low-mass companions of which are newly identified to be He whitedwarfs using Hubble Space Telescope data. Four pulsars are also found to beassociated with X-ray sources. Similarly to the eclipsing pulsar M5C, M5G showslittle or no non-thermal X-ray emission, indicative of weak synchrotronradiation produced by intra-binary shocks. All the seven pulsars known in M5have short spin periods and five are in binary systems with low orbitaleccentricities. These characteristics differ from the overall GC pulsarpopulation, but confirm the expectations for the pulsar population in a clusterwith a small rate of stellar encounters per binary system.

Discovery and Timing of Millisecond Pulsars in the Globular Cluster M5 (NGC 5904) with FAST and Arecibo