NICER X-ray Observations of Seven Nearby Rotation-Powered Millisecond Pulsars

Abstract

NICER observed several rotation-powered millisecond pulsars to search for or confirm the presence of X-ray pulsations. When broad and sine-like, these pulsations may indicate thermal emission from hot polar caps at the magnetic poles on the neutron star surface. We report confident detections ($\ge 4.7\sigma$ after background filtering) of X-ray pulsations for five of the seven pulsars in our target sample: PSR J0614-3329, PSR J0636+5129, PSR J0751+1807, PSR J1012+5307, and PSR J2241-5236, while PSR J1552+5437 and PSR J1744-1134 remain undetected. Of those, only PSR J0751+1807 and PSR J1012+5307 had pulsations previously detected at the 1.7$\sigma$ and almost 3$\sigma$ confidence levels, respectively, in XMM-Newton data. All detected sources exhibit broad sine-like pulses, which are indicative of surface thermal radiation. As such, these MSPs are promising targets for future X-ray observations aimed at constraining the neutron star mass-radius relation and the dense matter equation of state using detailed pulse profile modeling. Furthermore, we find that three of the detected millisecond pulsars exhibit a significant phase offset between their X-ray and radio pulses.

arXiv comment25 pages, 11 tables, 4 figures. In press in The Astrophysical Journal Letters

References in corpus (80)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
• LOFAR: The LOw-Frequency ARray
• GW170817: Measurements of Neutron Star Radii and Equation of State
• A NICER View of PSR J0030+0451: Millisecond Pulsar Parameter Estimation
• HI4PI: A full-sky HI survey based on EBHIS and GASS
• Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar
• TEMPO2, a new pulsar timing package. I: Overview
• A New Electron Density Model for Estimation of Pulsar and FRB Distances
• PSRCHIVE and PSRFITS An Open Approach to Radio Pulsar Data Storage and Analysis
• The Equation of State from Observed Masses and Radii of Neutron Stars
• A Radio Pulsar Spinning at 716 Hz
• The NANOGrav Nine-year Data Set: Mass and Geometric Measurements of Binary Millisecond Pulsars
• Tidal Deformabilities and Radii of Neutron Stars from the Observation of GW170817
• The NANOGrav 11-year Data Set: High-precision timing of 45 Millisecond Pulsars
• The Equation of State of Hot, Dense Matter and Neutron Stars
• High-precision timing of 42 millisecond pulsars with the European Pulsar Timing Array
• Swings between rotation and accretion power in a millisecond binary pulsar
• The Neutron Star Mass-Radius Relation and the Equation of State of Dense Matter
• Astrophysical Measurement of the Equation of State of Neutron Star Matter
• The Dense Matter Equation of State from Neutron Star Radius and Mass Measurements
• The XMM-Newton serendipitous survey. VII. The third XMM-Newton serendipitous source catalogue
• A Hydrogen Atmosphere Spectral Model Applied to the Neutron Star X7 in the Globular Cluster 47 Tucanae
• A 2.1 Solar Mass Pulsar Measured by Relativistic Orbital Decay
• Constraining the Mass and Radius of Neutron Stars in Globular Clusters
• Measurement of the Radius of Neutron Stars with High S/N Quiescent Low-mass X-ray Binaries in Globular Clusters
• Pulsar Polar Cap Heating and Surface Thermal X-Ray Emission II. Inverse Compton Radiation Pair Fronts
• The Green Bank Northern Celestial Cap Pulsar Survey - I: Survey Description, Data Analysis, and Initial Results
• Pulsar Polar Cap Heating and Surface Thermal X-Ray Emission I. Curvature Radiation Pair Fronts
• Constraining the Neutron Star Mass-Radius Relation and Dense Matter Equation of State with NICER. I. The Millisecond Pulsar X-ray Data Set
• Formation of black widows and redbacks -- two distinct populations of eclipsing binary millisecond pulsars
• Three Millisecond Pulsars in FERMI LAT Unassociated Bright Sources
• Improved Mass and Radius Constraints for Quiescent Neutron Stars in Omega Cen and NGC 6397
• The characteristics of millisecond pulsar emission: III.From low to high frequencies
• Pair Multiplicities and Pulsar Death
• The Nearest Millisecond Pulsar Revisited with XMM-Newton: Improved Mass-Radius Constraints for PSR J0437-4715
• The masses of the millisecond pulsar J1012+5307 and its white-dwarf companion
• A NICER view of PSR J0030+0451: evidence for a global-scale multipolar magnetic field
• Chandra X-Ray Observations of Nineteen Millisecond Pulsars in the Globular Cluster 47 Tucanae
• Dense matter with eXTP
• The H-test probability distribution revisited: Improved sensitivity
• Constraints on Neutron Star Properties from X-ray Observations of Millisecond Pulsars
• Neutron Star Mass-Radius Constraints of the Quiescent Low-mass X-ray Binaries X7 and X5 in the Globular Cluster 47 Tuc
• X-ray Radiation from the Millisecond Pulsar J0437-4715
• Constraining the equation of state of supra-nuclear dense matter from XMM-Newton observations of neutron stars in globular clusters
• XMM-Newton observations of four millisecond pulsars
• The Green Bank North Celestial Cap Pulsar Survey III: 45 New Pulsar Timing Solutions
• X-Ray Observations of Black Widow Pulsars
• Discovery of millisecond pulsars in radio searches of southern Fermi LAT sources
• Direct formation of millisecond pulsars from rotationally delayed accretion-induced collapse of massive white dwarfs
• Determining Neutron Star Properties by Fitting Oblate-Star Waveforms To X-ray Burst Oscillations
• Deep XMM-Newton Spectroscopic and Timing Observations of the Isolated Radio Millisecond Pulsar PSR J0030+0451
• A Survey of 56 Mid-latitude EGRET Error Boxes for Radio Pulsars
• Thermal X-rays from Millisecond Pulsars: Constraining the Fundamental Properties of Neutron Stars
• A multiwavelength study on the high-energy behaviour of Fermi/LAT pulsars
• Chandra X-ray Observations of 12 Millisecond Pulsars in the Globular Cluster M28
• Mass-to-Radius Ratio for the Millisecond Pulsar J0437-4715
• PSR J1024-0719: A Millisecond Pulsar in an Unusual Long-Period Orbit
• A millisecond pulsar in an extremely wide binary system
• The gamma-ray millisecond pulsar deathline, revisited - New velocity and distance measurements
• Chandra pulsar survey (ChaPS)
• X-ray Census of Millisecond Pulsars in the Galactic field
• Extreme Scattering Events Towards Two Young Pulsars
• XMM-Newton spectral and timing observations of the millisecond pulsar PSR J0218+4232
• The Case for PSR J1614-2230 as a NICER Target
• XMM-Newton spectral and timing analysis of the faint millisecond pulsars PSR J0751+1807 and PSR J1012+5307
• A Chandra Look at the X-ray Faint Millisecond Pulsars in the Globular Cluster NGC 6752
• High-Precision X-ray Timing of Three Millisecond Pulsars with NICER: Stability Estimates and Comparison with Radio
• X-ray emission from the planet pulsar B1257+12
• NuSTAR Hard X-ray Observations of the Energetic Millisecond Pulsars PSR B1821-24, PSR B1937+21, and PSR J0218+4232
• A millisecond pulsar discovery in a survey of unidentified Fermi $\gamma$-ray sources with LOFAR
• Discovery of Soft X-ray Pulsations from PSR J1231-1411 using NICER
• Ordinary X-rays from Three Extraordinary Millisecond Pulsars: XMM-Newton Observations of PSRs J0337+1715, J0636+5129, and J0645+5158
• Variability of Nineteen Millisecond Pulsars in 47 Tucanae with CHANDRA/HRC-S
• The ultracool helium-atmosphere white dwarf companion of PSR J0740+6620?
• A multi-wavelength study of nearby millisecond pulsar PSR J1400$-$1431: improved astrometry & an optical detection of its cool white dwarf companion
• PSR J0636+5128: A Heated Companion in a Tight Orbit
• Deep optical observations of the fields of two nearby millisecond pulsars with the VLT
• Gemini optical observations of binary millisecond-pulsars
• Thermal X-ray emission identified from the millisecond pulsar PSR J1909-3744

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• Relativistic force-free models of the thermal X-ray emission in millisecond pulsars observed by NICER
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• Rapidly spinning dark matter-admixed neutron stars
• Phase resolved spectrum of the Crab pulsar from NICER
• Disappearance of the Fe K$\alpha$ emission line in Ultra Compact X-ray Binaries 4U 1543-624 and Swift J1756.9-2508
• On the vanishing orbital X-ray variability of the eclipsing binary millisecond pulsar 47 Tuc W
• Mass and radius of the most massive neutron star: The probe of the equation of state and perturbative QCD
• Selection Effects in Periodic X-ray Data from Maximizing Detection Statistics
• Rapid orbital expansion in millisecond pulsar PSR J0636+5128: evaporation winds?
• Fastest spinning millisecond pulsars: indicators for quark matter in neutron stars?
• Rapidly Spinning Massive Pulsars as an Indicator of Quark Deconfinement
• Localisation of the non-thermal X-ray emission of PSR~J2229+6114 from its multi-wavelength pulse profiles
• Correlation between the curvature and some properties of the neutron star
• Possible counterpart signal of the Fermi bubbles at the cosmic-ray positrons