The High Time Resolution Universe Pulsar Survey X: Discovery of four millisecond pulsars and updated timing solutions of a further 12

Abstract

We report on the discovery of four millisecond pulsars (MSPs) in the High Time Resolution Universe (HTRU) pulsar survey being conducted at the Parkes 64-m radio telescope. All four MSPs are in binary systems and are likely to have white dwarf companions. In addition, we present updated timing solutions for 12 previously published HTRU MSPs, revealing new observational parameters such as five proper motion measurements and significant temporal dispersion measure variations in PSR J1017-7156. We discuss the case of PSR J1801-3210, which shows no significant period derivative after four years of timing data. Our best-fit solution shows a period derivative of the order of $10^{-23}$, an extremely small number compared to that of a typical MSP. However, it is likely that the pulsar lies beyond the Galactic Centre, and an unremarkable intrinsic period derivative is reduced to close to zero by the Galactic potential acceleration. Furthermore, we highlight the potential to employ PSR J1801-3210 in the strong equivalence principle test due to its wide and circular orbit. In a broader comparison with the known MSP population, we suggest a correlation between higher mass functions and the presence of eclipses in `very low-mass binary pulsars', implying that eclipses are observed in systems with high orbital inclinations. We also suggest that the distribution of the total mass of binary systems is inversely-related to the Galactic height distribution. Finally, we report on the first detection of PSRs J1543-5149 and J1811-2404 as gamma-ray pulsars.

21 pages, 9 figures, 2 tables, MNRAS accepted

References in corpus (12)

• Shapiro delay measurement of a two solar mass neutron star
• TEMPO2, a new pulsar timing package. I: Overview
• PSRCHIVE and PSRFITS An Open Approach to Radio Pulsar Data Storage and Analysis
• The relativistic pulsar-white dwarf binary PSR J1738+0333 II. The most stringent test of scalar-tensor gravity
• Precise Gamma-Ray Timing and Radio Observations of 17 Fermi Gamma-Ray Pulsars
• Formation of millisecond pulsars with CO white dwarf companions - II. Accretion, spin-up, true ages and comparison to MSPs with He white dwarf companions
• An Eccentric Binary Millisecond Pulsar in the Galactic Plane
• Dispersion Measure Variations and their Effect on Precision Pulsar Timing
• Binary Millisecond Pulsar Discovery via Gamma-Ray Pulsations
• Six millisecond pulsars detected by the Fermi Large Area Telescope and the radio/gamma-ray connection of millisecond pulsars
• Radio Detection of the Fermi LAT Blind Search Millisecond Pulsar J1311-3430
• Formation of the planet around the millisecond pulsar J1719-1438

Cited by in corpus (46)

• High-precision timing of 42 millisecond pulsars with the European Pulsar Timing Array
• The NANOGrav 15-year Data Set: Observations and Timing of 68 Millisecond Pulsars
• The Third Fermi Large Area Telescope Catalog of Gamma-ray Pulsars
• Prospects for High-Precision Pulsar Timing with the New Effelsberg PSRIX Backend
• Disrupted Globular Clusters Can Explain the Galactic Center Gamma Ray Excess
• A LOFAR census of millisecond pulsars
• Searches for Gravitational Waves from Known Pulsars at Two Harmonics in 2015-2017 LIGO Data
• Low-frequency Faraday rotation measures towards pulsars using LOFAR: probing the 3-D Galactic halo magnetic field
• Pulsar Observations of Extreme Scattering Events
• Evidence for a minimum ellipticity in millisecond pulsars
• The High Time Resolution Universe Pulsar Survey XII : Galactic plane acceleration search and the discovery of 60 pulsars
• The Parkes pulsar timing array second data release: Timing analysis
• The MeerTime Pulsar Timing Array -- A Census of Emission Properties and Timing Potential
• Radio detection prospects for a bulge population of millisecond pulsars as suggested by Fermi LAT observations of the inner Galaxy
• Long-term observations of the pulsars in 47 Tucanae. I. A study of four elusive binary systems
• The NANOGrav Nine-year Data Set: Astrometric Measurements of 37 Millisecond Pulsars
• Constraining the dense matter equation-of-state with radio pulsars
• The gamma-ray millisecond pulsar deathline, revisited - New velocity and distance measurements
• 21-year timing of the black-widow pulsar J2051-0827
• First detection of frequency-dependent, time-variable dispersion measures
• PSR J2322$-$2650 -- A low-luminosity millisecond pulsar with a planetary-mass companion
• FAST early pulsar discoveries: Effelsberg follow-up
• The High Time Resolution Universe Survey - XI. Discovery of five recycled pulsars and the optical detectability of survey white dwarf companions
• Very long baseline astrometry of PSR J1012+5307 and its implications on alternative theories of gravity
• Eight Millisecond Pulsars Discovered in the Arecibo PALFA Survey
• An Observationally-Derived Kick Distribution for Neutron Stars in Binary Systems
• Wide binary companions to massive stars and their use in constraining natal kicks
• Radio Timing and Optical Photometry of the Black Widow System PSR J1953+1846A in the Globular Cluster M71
• Shapiro delay in PSR~J1811$-$2405
• Discovery of 37 new pulsars through GPU-accelerated reprocessing of archival data of the Parkes Multibeam Pulsar Survey
• Close-in Exoplanets as Candidates of Strange Quark Matter Objects
• HIPSR: A Digital Signal Processor for the Parkes 21-cm Multibeam Receiver
• A precise mass measurement of PSR J2045+3633
• Supernova Remnant Kesteven 27: Interaction with A Neighbor HI Cloud Viewed by Fermi
• The High Time Resolution Universe Pulsar Survey -- XV: completion of the intermediate latitude survey with the discovery and timing of 25 further pulsars
• Irradiated but not eclipsed, the case of PSR J0610-2100
• A spider timing model: accounting for quadrupole deformations and relativity in close pulsar binaries
• Exploring the Effect of Periastron Advance in Small-Eccentricity Binary Pulsars
• The dynamics of Galactic centre pulsars: constraining pulsar distances and intrinsic spin-down
• Decade Long Timing Study of the Black Widow Millisecond Pulsar J1544+4937
• The FAST Galactic Plane Pulsar Snapshot Survey: VII. Six millisecond pulsars in compact orbits with massive white dwarf companions
• A Census of Pulsars in Possible Association with Galactic Open Clusters
• Secular dynamics of the triple system harbouring PSR J0337+1715 and implications for the origin of its orbital configuration
• Timing Gamma-ray Pulsars using Gibbs Sampling
• A study of dynamical effects in the observed second time-derivative of the spin or orbital frequencies of pulsars
• High Energy Radiation from Spider Pulsars