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• W4315706730 abstract "PSRJ1910-5959A (J1910A) is a binary millisecond pulsar in a 0.837 day circular orbit around a helium white dwarf (HeWD) companion. This pulsar is located 6.3 arcmin away from the centre of the globular cluster NGC6752. Given the large offset, the association of the pulsar to NGC6752 has been debated. We have made use of two decades of archival Parkes 64-m Murriyang telescope data and recently carried out observations with the MeerKAT telescope. We obtained Pulse times of arrival using standard data reduction techniques and analysed using Bayesian pulsar timing techniques. We analysed the pulsar's total intensity and polarisation profile, to study the interstellar scattering along the line of sight, and the pulsar's geometry by applying the rotating vector model. We obtain precise measurements of several post-Keplerian parameters: the range $r=0.202(6)T_odot$ and shape s=0.999823(4) of the Shapiro delay, from which we infer the orbital inclination to be $88.9^{+0.15}_{-0.14}deg$ and the masses of both the pulsar and the companion to be $1.55(7)M_{odot}$ and $0.202(6)M_{odot}$ respectively; a secular change in the orbital period $dot{P}_{rm b}=-53^{+7.4}_{-6.0}times 10^{-15}$,s,s$^{-1}$ that proves the association to NGGC6752 and a secular change in the projected semi-major axis of the pulsar $dot{x}= -40.7^{+7.3}_{-8.2}times10^{-16}$,s,s$^{-1}$ that is likely caused by the spin-orbit interaction from a misaligned HeWD spin, at odds with the likely isolated binary evolution of the system. We also discuss some theoretical models for the structure and evolution of WDs in NS-WD binaries by using J1910A's companion as a test bed. J1910A is a rare system for which several parameters of both the pulsar and the HeWD companion can be accurately measured. As such, it is a test bed to discriminate between alternative models for HeWD structure and cooling." @default.
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• W4315706730 date "2023-01-10" @default.
• W4315706730 modified "2023-09-26" @default.
• W4315706730 title "PSR~J1910$-$5959A: A rare gravitational laboratory for testing white dwarf models" @default.
• W4315706730 doi "https://doi.org/10.48550/arxiv.2301.04055" @default.
• W4315706730 hasPublicationYear "2023" @default.
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