Timing of millisecond pulsars in NGC 6752 - II. Proper motions of the pulsars in the cluster outskirts

Abstract

Exploiting a five-year span of data, we present improved timing solutions for the five millisecond pulsars known in the globular cluster NGC 6752. They include proper motion determinations for the two outermost pulsars in the cluster, PSR J1910-5959A and PSR J1910-5959C. The values of the proper motions are in agreement with each other within current uncertainties, but do not match (at 4 sigma and 2 sigma level respectively) with the value of the proper motion of the entire globular cluster derived in the optical band. Implications of these results for the cluster membership of the two pulsars are investigated. Prospects for the detection of the Shapiro delay in the binary system J1910-5959A are also discussed.

8 pages, 3 figures, accepted for publication in ApJ

References in corpus (3)

• Measurement of Orbital Decay in the Double Neutron Star Binary PSR B2127+11C
• The masses of PSR J1911-5958A and its white dwarf companion
• The puzzling properties of the Helium White Dwarf orbiting the millisecond pulsar PSR J1911-5958A in NGC 6752

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• Identification of Faint Chandra X-ray Sources in the Core-Collapsed Globular Cluster NGC 6752
• Millisecond pulsars around intermediate-mass black holes in globular clusters
• PSR~J1910$-$5959A: A rare gravitational laboratory for testing white dwarf models
• Discoveries and Timing of Pulsars in NGC 6440
• The dynamics of Galactic centre pulsars: constraining pulsar distances and intrinsic spin-down
• Timing of millisecond pulsars in NGC\,6752 -- III. On the presence of non-luminous matter in the cluster's core