Long-term observations of the pulsars in 47 Tucanae. I. A study of four elusive binary systems

Abstract

For the past couple of decades, the Parkes radio telescope has been regularly observing the millisecond pulsars in 47 Tucanae (47 Tuc). This long-term timing program was designed to address a wide range of scientific issues related to these pulsars and the globular cluster where they are located. In this paper, the first of a series, we address one of these objectives: the characterization of four previously known binary pulsars for which no precise orbital parameters were known, namely 47 Tuc P, V, W and X (pulsars 47 Tuc R and Y are discussed elsewhere). We determined the previously unknown orbital parameters of 47 Tuc V and X and greatly improved those of 47 Tuc P and W. For pulsars W and X we obtained, for the first time, full coherent timing solutions across the whole data span, which allowed a much more detailed characterization of these systems. 47 Tuc W, a well-known tight eclipsing binary pulsar, exhibits a large orbital period variability, as expected for a system of its class. 47 Tuc X turns out to be in a wide, extremely circular, 10.9-day long binary orbit and its position is ~3.8 arcmin away from the cluster center, more than three times the distance of any other pulsar in 47 Tuc. These characteristics make 47 Tuc X a very different object with respect to the other pulsars of the cluster.

arXiv commentAccepted for publication by MNRAS, 18 pages, 11 figures

References in corpus (52)

• On the Absorption of X-rays in the Interstellar Medium
• The ATNF Pulsar Catalogue
• Atomic Data for Astrophysics. II. New Analytic Fits for Photoionization Cross Sections of Atoms and Ions
• The ATNF Pulsar Catalogue
• PSRCHIVE and PSRFITS An Open Approach to Radio Pulsar Data Storage and Analysis
• The second US Naval Observatory CCD Astrograph Catalog (UCAC2)
• DSPSR: Digital Signal Processing Software for Pulsar Astronomy
• A Radio Pulsar/X-ray Binary Link
• Swings between rotation and accretion power in a millisecond binary pulsar
• Distances and ages of NGC 6397, NGC 6752 and 47 Tuc
• A Hydrogen Atmosphere Spectral Model Applied to the Neutron Star X7 in the Globular Cluster 47 Tucanae
• A state change in the low-mass X-ray binary XSS J12270-4859
• Precision Timing Measurements of PSR J1012+5307
• Observations of 20 millisecond pulsars in 47 Tucanae at 20 cm
• High Resolution X-ray Imaging of a Globular Cluster Core: Compact Binaries in 47Tuc
• A state change in the missing link binary pulsar system PSR J1023+0038
• A Deep Chandra Survey of the Globular Cluster 47 Tucanae: Catalog of Point Sources
• Detection of ionized gas in the globular cluster 47 Tucanae
• The Frequency of Binary Stars in the Core of 47 Tucanae
• Discovery of PSR J1227-4853: A transition from a low-mass X-ray binary to a redback millisecond pulsar
• Chandra X-Ray Observations of Nineteen Millisecond Pulsars in the Globular Cluster 47 Tucanae
• An Age Difference of 2 Gyr between a Metal-Rich and a Metal-Poor Globular Cluster
• Surrounded by Spiders! New Black Widows and Redbacks in the Galactic Field
• A New Search Technique for Short Orbital Period Binary Pulsars
• A parallax distance and mass estimate for the transitional millisecond pulsar system J1023+0038
• X-ray follow-ups of XSSJ12270-4859: a low-mass X-ray binary with gamma ray FERMI-LAT association
• Chandra Study of a Complete Sample of Millisecond Pulsars in 47Tuc and NGC6397
• Is FIRST J102347.6+003841 Really a Cataclysmic Binary?
• The masses of PSR J1911-5958A and its white dwarf companion
• X-ray Radiation from the Millisecond Pulsar J0437-4715
• The intriguing nature of the high energy gamma ray source XSSJ12270-4859
• Timing the millisecond pulsars in 47 Tucanae
• On the disruption of pulsar and X-ray binaries in globular clusters
• Radio imaging observations of PSR J1023+0038 in an LMXB state
• XMM-Newton observations of four millisecond pulsars
• An X-ray Variable Millisecond Pulsar in the Globular Cluster 47 Tucanae: Closing the Link to Low Mass X-ray Binaries
• FIRST J102347.6+003841: The First Radio-Selected Cataclysmic Variable
• A Comprehensive Catalogue of Variable Stars in the field of 47 Tucanae
• A Chandra X-ray Observatory Study of PSR J1740--5340 and Candidate Millisecond Pulsars in the Globular Cluster NGC 6397
• Engulfing a radio pulsar: the case of PSR J1023+0038
• Optical Detection of a Variable Millisecond Pulsar Companion in 47 Tucanae
• The High Time Resolution Universe Pulsar Survey X: Discovery of four millisecond pulsars and updated timing solutions of a further 12
• The Spectral Energy Distributions of White Dwarfs in 47 Tucanae: The Distance to the Cluster
• A Millisecond Pulsar Optical Counterpart with Large-Amplitude Variability in the Globular Cluster 47 Tucanae
• Discovery of Two New Pulsars in 47 Tucanae (NGC 104)
• Multi-wavelength observations of the transitional millisecond pulsar binary XSSJ12270-4859
• Determination of the orbital parameters of binary pulsars
• XMM-Newton and optical follow-up observations of SDSS J093249.57+472523.0 and SDSS J102347.67+003841.2
• A Chandra Look at the X-ray Faint Millisecond Pulsars in the Globular Cluster NGC 6752
• Optical Identification of He White Dwarfs Orbiting Four Millisecond Pulsars in the Globular Cluster 47 Tucanae
• A Shapiro delay detection in the binary system hosting the millisecond pulsar PSR J1910-5959A
• Discovery of near-ultraviolet counterparts to millisecond pulsars in the globular cluster 47 Tucanae

Cited by in corpus (58)

• Observational evidence for intermediate-mass black holes
• An intermediate-mass black hole in the centre of the globular cluster 47 Tucanae
• First search for gravitational waves from known pulsars with Advanced LIGO
• A Multi-Mass Velocity Dispersion Model of 47 Tucanae Indicates No Evidence for an Intermediate Mass Black Hole
• Long-term observations of the pulsars in 47 Tucanae - II. Proper motions, accelerations and jerks
• The ultracompact nature of the black hole candidate X-ray binary 47 Tuc X9
• Eight new millisecond pulsars from the first MeerKAT globular cluster census
• An algorithm for determining the rotation count of pulsars
• Secular effects of Ultralight Dark Matter on Binary Pulsars
• Internal gas models and central black hole in 47 Tucanae using millisecond pulsars
• Chandra studies of the globular cluster 47 Tucanae: A deeper X-ray source catalogue, five new X-ray counterparts to millisecond radio pulsars, and new constraints to r-mode instability window
• On the black hole content and initial mass function of 47 Tuc
• The MAVERIC Survey: Chandra/ACIS Catalog of Faint X-ray sources in 38 Galactic globular clusters
• The TRAPUM L-band survey for pulsars in Fermi-LAT gamma-ray sources
• Discovery and timing of ten new millisecond pulsars in the globular cluster Terzan 5
• The FAST discovery of an Eclipsing Binary Millisecond Pulsar in the Globular Cluster M92 (NGC 6341)
• An extremely low-mass He white dwarf orbiting the millisecond pulsar J1342+2822B in the globular cluster M3
• Compact Object Modeling in the Globular Cluster 47 Tucanae
• A Census of X-ray Millisecond Pulsars in Globular Clusters
• Understanding the $\gamma$-ray emission from the globular cluster 47 Tuc: evidence for dark matter?
• Discovery of Millisecond Pulsars in the Globular Cluster Omega Centauri
• A Deep Chandra X-ray Observatory Study of the Millisecond Pulsar Population in the Globular Cluster Terzan 5
• Upgraded GMRT survey for pulsars in globular clusters. I: Discovery of a millisecond binary pulsar in NGC 6652
• MeerKAT discovery of 13 new pulsars in Omega Centauri
• The MAVERIC survey: A hidden pulsar and a black hole candidate in ATCA radio imaging of the globular cluster NGC 6397
• Constraints from globular cluster pulsars on the magnetic field in the Galactic halo
• Timing analysis of the 2022 outburst of the accreting millisecond X-ray pulsar SAX J1808.4$-$3658: hints of an orbital shrinking
• Discovery and Timing of Millisecond Pulsars in the Globular Cluster M5 (NGC 5904) with FAST and Arecibo
• Identifying the formation mechanism of redback pulsars
• Intermediate mass black holes in globular clusters: effects on jerks and jounces of millisecond pulsars
• The FAST Globular Cluster Pulsar Survey (GC FANS)
• Identifications of Faint Chandra Sources in the Globular Cluster M3
• A comparison of millisecond pulsar populations between globular clusters and the Galactic field
• Likely detection of gamma-ray pulsations of PSR~J1717+4308A in NGC~6341 and implication of the gamma-ray millisecond pulsars in globular clusters
• A MeerKAT look at the polarization of 47 Tucanae pulsars: magnetic field implications
• Discovery and Timing of Millisecond Pulsars with the Arecibo 327 MHz Drift-Scan Survey
• Decade Long Timing Study of the Black Widow Millisecond Pulsar J1544+4937
• Identifying the brightest Galactic globular clusters for future observations by H.E.S.S. and CTA
• Chandra and HST Studies of Six Millisecond Pulsars in the Globular Cluster M13
• Timing of Pulsars in the Globular Cluster Omega Centauri
• A new pulsar candidate in 47 Tucanae discovered with MeerKAT imaging
• On the vanishing orbital X-ray variability of the eclipsing binary millisecond pulsar 47 Tuc W
• A 34 Yr Timing Solution of the Redback Millisecond Pulsar Terzan 5A
• Outliers: multicolour photometry guiding the search for evolved binary systems in the globular cluster 47 Tucanae
• Evidence of intra-binary shock emission from the redback pulsar PSR J1048+2339
• Wide Bandwidth Observations of Pulsars C, D and J in 47 Tucanae
• NGC 1851A: Revealing an ongoing three-body encounter in a dense globular cluster
• Mining the time axis with TRON. I. Millisecond pulsars in Omega Centauri, Terzan 5 and 47 Tucanae detected through MeerKAT interferometric imaging
• A follow-up on intermediate-mass black hole candidates in the second LIGO-Virgo observing run with the Bayes Coherence Ratio
• Intermediate Mass Black Holes: A brief review
• Probing populations of dark stellar remnants in the globular clusters 47 Tuc and Terzan 5 using pulsar timing
• Long-term observations of pulsars in the globular clusters 47 Tucanae and M15
• Possible tidal dissipation in millisecond pulsar binaries
• A study of dynamical effects in the observed second time-derivative of the spin or orbital frequencies of pulsars
• Illuminating Hidden Pulsars: Scintillation-Enhanced Discovery of Two Binary Millisecond Pulsars in M13 with FAST
• Reconstruction of spider system's observables from orbital period modulations via the Applegate mechanism
• Timing Gamma-ray Pulsars using Gibbs Sampling
• PSR J0024$-$7204ai: a massive, eccentric binary system in the globular cluster 47 Tucanae