A two-solar-mass neutron star measured using Shapiro delay
- P. Demorest, T. Pennucci, S. Ransom, M. Roberts, J. Hessels
- PhysicsNature
- 28 October 2010
Radio timing observations of the binary millisecond pulsar J1614-2230 that show a strong Shapiro delay signature are presented and the pulsar mass is calculated to be (1.97 ± 0.04)M⊙, which rules out almost all currently proposed hyperon or boson condensate equations of state.
A direct localization of a fast radio burst and its host
- S. Chatterjee, C. Law, H. Langevelde
- PhysicsNature
- 4 January 2017
The authors' observations are inconsistent with the fast radio burst having a Galactic origin or its source being located within a prominent star-forming galaxy, and the source appears to be co-located with a low-luminosity active galactic nucleus or a previously unknown type of extragalactic source.
The Host Galaxy and Redshift of the Repeating Fast Radio Burst FRB 121102
- S. Tendulkar, C. Bassa, R. Wharton
- Physics
- 4 January 2017
The precise localization of the repeating fast radio burst (FRB 121102) has provided the first unambiguous association (chance coincidence probability p ≲ 3 × 10−4) of an FRB with an optical and…
Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar
- H. Cromartie, E. Fonseca, W. W. Zhu
- PhysicsNature Astronomy
- 1 January 2020
Despite its importance to our understanding of physics at supranuclear densities, the equation of state (EoS) of matter deep within neutron stars remains poorly understood. Millisecond pulsars (MSPs)…
The Repeating Fast Radio Burst FRB 121102 as Seen on Milliarcsecond Angular Scales
- B. Marcote, Z. Paragi, R. Wharton
- Physics
- 4 January 2017
The millisecond-duration radio flashes known as fast radio bursts (FRBs) represent an enigmatic astrophysical phenomenon. Recently, the sub-arcsecond localization (∼100 mas precision) of FRB 121102…
A strong magnetic field around the supermassive black hole at the centre of the Galaxy
- R. Eatough, H. Falcke, N. Wex
- PhysicsNature
- 14 August 2013
Multi-frequency radio measurements of a newly discovered pulsar close to the Galactic Centre are reported and it is shown that the pulsar’s unusually large Faraday rotation indicates that there is a dynamically important magnetic field near the black hole.
The NANOGrav 12.5 yr Data Set: Search for an Isotropic Stochastic Gravitational-wave Background
- Z. Arzoumanian, P. Baker, C. A. Witt
- PhysicsAstrophysical Journal Letters
- 9 September 2020
We search for an isotropic stochastic gravitational-wave background (GWB) in the 12.5 yr pulsar-timing data set collected by the North American Nanohertz Observatory for Gravitational Waves. Our…
THE NANOGRAV NINE-YEAR DATA SET: MASS AND GEOMETRIC MEASUREMENTS OF BINARY MILLISECOND PULSARS
- E. Fonseca, T. Pennucci, Weiwei Zhu
- Physics
- 2 March 2016
We analyze 24 binary radio pulsars in the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) nine-year data set. We make 14 significant measurements of the Shapiro delay,…
An extreme magneto-ionic environment associated with the fast radio burst source FRB 121102
- D. Michilli, A. Seymour, D. Whitlow
- PhysicsNature
- 11 January 2018
Observations of FRB 121102 show almost 100 per cent linearly polarized emission at a very high and variable Faraday rotation measure, demonstrating that the fast radio burst source is in an extreme and dynamic magneto-ionic environment, and the short durations of the bursts suggest a neutron star origin.
A repeating fast radio burst source localized to a nearby spiral galaxy
- B. Marcote, K. Nimmo, A. Zwaniga
- PhysicsNature
- 1 January 2020
Only one repeating fast radio burst has been localized, to an irregular dwarf galaxy; now another is found to come from a star-forming region of a nearby spiral galaxy, suggesting that repeating FRBs may have a wide range of luminosities, and originate from diverse host galaxies and local environments.
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