A two-solar-mass neutron star measured using Shapiro delay

@article{Demorest2010ATN,
  title={A two-solar-mass neutron star measured using Shapiro delay},
  author={P. Demorest and T. Pennucci and S. Ransom and M. Roberts and J. Hessels},
  journal={Nature},
  year={2010},
  volume={467},
  pages={1081-1083}
}
Neutron stars are composed of the densest form of matter known to exist in our Universe, the composition and properties of which are still theoretically uncertain. Measurements of the masses or radii of these objects can strongly constrain the neutron star matter equation of state and rule out theoretical models of their composition. The observed range of neutron star masses, however, has hitherto been too narrow to rule out many predictions of ‘exotic’ non-nucleonic components. The Shapiro… Expand
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References

SHOWING 1-10 OF 36 REFERENCES
The Massive Pulsar PSR J1614?2230: Linking Quantum Chromodynamics, Gamma-ray Bursts, and Gravitational Wave Astronomy
The recent measurement of the Shapiro delay in the radio pulsar PSR J1614–2230 yielded a mass of 1.97 ± 0.04 M ☉, making it the most massive pulsar known to date. Its mass is high enough that, evenExpand
Observational constraints on hyperons in neutron stars
The possibility that neutron stars may contain substantial hyperon populations has important implications for neutron-star cooling and, through bulk viscosity, the viability of the r-modes ofExpand
Neutron star observations: Prognosis for equation of state constraints
Abstract We investigate how current and proposed observations of neutron stars can lead to an understanding of the state of their interiors and the key unknowns: the typical neutron star radius andExpand
A test of general relativity from the three-dimensional orbital geometry of a binary pulsar
TLDR
High-precision radio observations of the binary millisecond pulsar PSR J0437-4715 are reported, which establish the three-dimensional structure of its orbit and see the Shapiro delay predicted by general relativity, and the mass of the neutron star and its white dwarf companion is determined. Expand
The Physics of Neutron Stars
TLDR
Observations that include studies of pulsars in binary systems, thermal emission from isolated neutron stars, glitches from pulsars, and quasi-periodic oscillations from accreting neutron stars provide information about neutron star masses, radii, temperatures, ages, and internal compositions. Expand
Soft equations of state for neutron-star matter ruled out by EXO 0748 - 676
TLDR
A determination of the mass and radius of the neutron star EXO 0748 - 676 that appears to rule out all the soft equations of state of neutron-star matter, suggesting that condensates and unconfined quarks do not exist in the centres of neutron stars. Expand
The Mass of a Millisecond Pulsar
We report on nearly 2 years of timing observations of the low-mass binary millisecond pulsar PSR J1909-3744 with the Caltech-Parkes-Swinburne Recorder II, a new instrument that gives unprecedentedExpand
Rotating neutron stars: an invariant comparison of approximate and numerical space-time models
We compare three different models of rotating neutron star spacetimes: i) the Hartle-Thorne (1968) slow-rotation approximation, keeping terms up to second order in the stellar angular velocity; ii)Expand
A Massive Neutron Star in the Globular Cluster M5
We report the results of 19 years of Arecibo timing for two pulsars in the globular cluster NGC 5904 (M5), PSR B1516+02A (M5A) and PSR B1516+02B (M5B). This has resulted in the measurement of theExpand
EVOLUTIONARY SEQUENCES FOR LOW- AND INTERMEDIATE-MASS X-RAY BINARIES
We present the results of a systematic study of the evolution of low- and intermediate-mass X-ray binaries (LMXBs and IMXBs). Using a standard Henyey-type stellar evolution code and a standard modelExpand
...
1
2
3
4
...