The Eccentric Binary Millisecond Pulsar in NGC 1851 Available to Purchase

PSR J0514–4002A is a 5‐ms pulsar is located in the globular cluster NGC 1851; it belongs to a highly eccentric $(e = 0.888)$ binary system. It is one of the earliest known examples of a numerous and fast‐growing class of eccentric binary MSPs recently discovered in globular clusters. Using the GBT, we have obtained a phase‐coherent timing solution for the pulsar, which includes a measurement of the rate of advance of periastron $ω̇ = 0.01289(4)° yr−1,$ which if due completely to general relativity, implies a total system mass of $2.453(14)M⊙;$ we also derive $mp<1.5M⊙$ and $mc>0.96M⊙.$ The companion is likely to be a massive white dwarf star.