FAST Globular Cluster Pulsar Survey: Twenty-Four Pulsars Discovered in Fifteen Globular Clusters

TL;DR

This paper reports the discovery of 24 new pulsars in 15 globular clusters using FAST, including the first pulsars in M2, M10, and M14, significantly expanding the known pulsar population in these clusters.

Contribution

First large-scale pulsar survey of globular clusters with FAST, discovering 24 new pulsars and identifying new binary systems and isolated pulsars, including the first in some clusters.

Findings

Discovered 24 pulsars in 15 globular clusters.

Identified new binary systems, including black widow pulsars.

Total of 32 globular cluster pulsars discovered by FAST so far.

Abstract

We present the discovery of 24 pulsars in 15 Globular Clusters (GCs) using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). These include the first pulsar discoveries in M2, M10, and M14. Most of the new systems are either confirmed or likely members of binary systems. M53C, NGC6517H and I are the only three pulsars confirmed to be isolated. M14A is a black widow pulsar with an orbital period of 5.5 hours and a minimum companion mass of 0.016 \Ms. M14E is an eclipsing binary pulsar with an orbital period of 20.3 hours. With the other 8 discoveries that have been reported elsewhere, in total 32 GC pulsars have been discovered by FAST so far. In addition, We detected M3A twice. This was enough to determine that it is a black widow pulsar with an orbital period of 3.3 hours and a minimum companion mass of 0.0125 \Ms.