The Millisecond Pulsars in NGC 6760
arXiv:astro-ph/0411160 · doi:10.1086/427748
Abstract
We present the results of recent Arecibo and Green Bank observations of the globular cluster NGC 6760. Using Arecibo, a phase-coherent timing solution has been obtained for the previously known binary pulsar in this cluster, PSR J1911+0102A. We have also discovered a new millisecond pulsar in NGC 6760, PSR J1911+0101B, an isolated object with a rotational period of 5.38 ms and a dispersion measure DM = 196.7 cm-3 pc. Both pulsars are located within 1.3 core radii of the cluster center and have negative period derivatives. The resulting lower limits for the accelerations of the pulsars are within the range expected given a simple model of the cluster. A search for eclipses in the PSR J1911+0102A binary system using both telescopes yielded negative results. The corresponding limits on the extra gas column density at superior conjunction are consistent with the hypothesis that the observational properties of ultra-low-mass binary pulsars like PSR J1911+0102A are strongly affected by the inclination of the orbital plane of the system. Among globular cluster pulsar populations, that of NGC 6760 exhibits one of the largest known spreads in DM. This quantity seems to be roughly proportional to a cluster's central DM; this suggests that the observed spread is caused by a turbulent interstellar medium at spatial scales of 1 pc.
10 pages in referee format, 4 figures, one table, re-submitted to the Astrophysical Journal
References in corpus (1)
Cited by in corpus (36)
- Eight New Millisecond Pulsars in NGC 6440 and NGC 6441
- The Timing of Nine Globular Cluster Pulsars
- Binary and Millisecond Pulsars
- Long-term observations of the pulsars in 47 Tucanae - II. Proper motions, accelerations and jerks
- The masses of PSR J1911-5958A and its white dwarf companion
- A 1.4-GHz Arecibo Survey for Pulsars in Globular Clusters
- Using long-term millisecond pulsar timing to obtain physical characteristics of the bulge globular cluster Terzan 5
- Broadband Pulsations from PSR B1821-24: Implications for Emission Models and the Pulsar Population of M28
- Evidence for gravitational quadrupole moment variations in the companion of PSR J2051-0827
- Discovery of three new millisecond pulsars in Terzan 5
- Internal gas models and central black hole in 47 Tucanae using millisecond pulsars
- Magnetic Fields of Neutron Stars
- Timing the Eccentric Binary Millisecond Pulsar in NGC 1851
- Radio timing and optical photometry of the black widow system PSR J1518+0204C in the globular cluster M5
- Six New Recycled Globular Cluster Pulsars Discovered with the Green Bank Telescope
- A Census of X-ray Millisecond Pulsars in Globular Clusters
- Discovery of Millisecond Pulsars in the Globular Cluster Omega Centauri
- Radio Timing and Optical Photometry of the Black Widow System PSR J1953+1846A in the Globular Cluster M71
- Evidence of non-luminous matter in the center of M62
- FAST Discovery of Eight Isolated Millisecond Pulsars in NGC 6517
- Discovery and Timing of Millisecond Pulsars in the Globular Cluster M5 (NGC 5904) with FAST and Arecibo
- Intermediate mass black holes in globular clusters: effects on jerks and jounces of millisecond pulsars
- Discoveries and Timing of Pulsars in NGC 6440
- The FAST Globular Cluster Pulsar Survey (GC FANS)
- A comparison of millisecond pulsar populations between globular clusters and the Galactic field
- A MeerKAT view of the pulsars in the globular cluster NGC 6522
- The Analyses of Globular Clusters Pulsars and Their Detection Efficiency
- A Chandra X-ray census of the interacting binaries in old open clusters - Collinder 261
- One blind and three targeted searches for (sub)millisecond pulsars
- Radio pulsar binaries in globular clusters: their orbital eccentricities and stellar interactions
- Long-term observations of pulsars in the globular clusters 47 Tucanae and M15
- Millisecond pulsars phenomenology under the light of graph theory
- Possible tidal dissipation in millisecond pulsar binaries
- Illuminating Hidden Pulsars: Scintillation-Enhanced Discovery of Two Binary Millisecond Pulsars in M13 with FAST
- Discovery and Timing of the First Millisecond Pulsar in NGC 6316
- High Energy Radiation from Spider Pulsars