The FAST Galactic Plane Pulsar Snapshot Survey: VII. Six millisecond pulsars in compact orbits with massive white dwarf companions
Z. L. Yang, J. L. Han, T. Wang, P. F. Wang, W. Q. Su, W. C. Chen, C., Wang, D. J. Zhou, Y. Yan, W. C. Jing, N. N. Cai, L. Xie, J. Xu, H. G. Wang,, R. X. Xu

TL;DR
This paper reports the discovery of six new millisecond pulsars in compact orbits with massive white dwarf companions, doubling the known population and providing new insights into their masses and orbital characteristics.
Contribution
It presents the discovery and detailed analysis of six IMBPs with massive white dwarf companions, expanding the known sample and constraining pulsar and companion masses.
Findings
Six new IMBPs discovered in the Galactic Plane survey.
All have massive white dwarf companions with masses > 0.8 M_sun.
Measured pulsar masses, including a high-mass pulsar of 1.84 M_sun.
Abstract
Binary millisecond pulsars with a massive white dwarf (WD) companion are intermediate-mass binary pulsars (IMBPs). They are formed via the Case BB Roche-lobe overflow evolution channel if they are in compact orbits with an orbital period of less than 1 day. They are fairly rare in the known pulsar population; only five such IMBPs have been discovered before, and one of them is in a globular cluster. Here we report six IMBPs in compact orbits: PSRs J0416+5201, J0520+3722, J1919+1341, J1943+2210, J1947+2304 and J2023+2853, discovered during the Galactic Plane Pulsar Snapshot survey by using the Five-hundred-meter Aperture Spherical radio Telescope, doubling the number of such IMBPs due to the high survey sensitivity in the short survey time of 5 minutes. Follow-up timing observations show that they all have either a CO WD or an ONeMg WD companion with a mass greater than about…
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Taxonomy
TopicsPulsars and Gravitational Waves Research · Geophysics and Gravity Measurements · Astronomy and Astrophysical Research
