Universality of free fall from the orbital motion of a pulsar in a stellar triple system

  title={Universality of free fall from the orbital motion of a pulsar in a stellar triple system},
  author={Anne M. Archibald and Nina Gusinskaia and Jason W. T. Hessels and Adam T. Deller and David L. Kaplan and Duncan R. Lorimer and Ryan S. Lynch and Scott M. Ransom and Ingrid H. Stairs},
Einstein’s theory of gravity—the general theory of relativity1—is based on the universality of free fall, which specifies that all objects accelerate identically in an external gravitational field. In contrast to almost all alternative theories of gravity2, the strong equivalence principle of general relativity requires universality of free fall to apply even to bodies with strong self-gravity. Direct tests of this principle using Solar System bodies3,4 are limited by the weak self-gravity of… 

Radio Pulsars as a Laboratory for Strong-field Gravity Tests

General relativity offers a classical description to gravitation and spacetime, and is a cornerstone for modern physics. It has passed a number of empirical tests with flying colours, mostly in the

Gravity Tests with Radio Pulsars

The discovery of the first binary pulsar in 1974 has opened up a completely new field of experimental gravity. In numerous important ways, pulsars have taken precision gravity tests quantitatively

Testing general relativity with black hole-pulsar binaries

Binary pulsars allow us to carry out precision tests of gravity and have placed stringent bounds on a broad class of theories beyond general relativity. Current and future radio telescopes, such as

Probing massive scalar fields from a pulsar in a stellar triple system

Pulsar timing observations precisely test general relativity. Recently, the hierarchical triple system PSR J0337 + 1715 has placed new constraints on the existence of a fifth force from violation in

New binary pulsar constraints on Einstein-æther theory after GW170817

The timing of millisecond pulsars has long been used as an exquisitely precise tool for testing the building blocks of general relativity, including the strong equivalence principle and Lorentz

Periastron shift of compact stellar orbits from general relativistic and tidal distortion effects near Sgr A*

The Galactic Centre (Sgr A*), hosting a supermassive black hole, carries sufficient potential for testing gravitational theories. Existing astrometric facilities on Very Large Telescope (VLT) and

Updated Binary Pulsar Constraints on Einstein-{\ae}ther Theory in Light of Gravitational Wave Constraints on the Speed of Gravity

Timing of millisecond pulsars has long been used as an exquisitely precise tool for testing the building blocks of general relativity, including the strong equivalence principle and Lorentz symmetry.

Gravitational mass of composite systems

The equivalence principle in combination with the special relativistic equivalence between mass and energy, E = mc(2), is one of the cornerstones of general relativity. However, for composite systems

Probing massive scalar and vector fields with binary pulsars

Precision tests of general relativity can be conducted by observing binary pulsars. Theories with massive fields exist to explain a variety of phenomena from dark energy to the strong CP problem.

General relativity verified by a triple-star system

  • C. Will
  • Physics, Education
  • 2018
A triple-star system provides a stringent test of the theory of gravity, based on the principle that all objects accelerate identically in an external gravitational field.



A Massive Pulsar in a Compact Relativistic Binary

Introduction Neutron stars with masses above 1.8 solar masses (M☉), possess extreme gravitational fields, which may give rise to phenomena outside general relativity. These strong-field deviations

Nordström’s scalar theory of gravity and the equivalence principle

General Relativity obeys the three equivalence principles, the “weak” one (all test bodies fall the same way in a given gravitational field), the “Einstein” one (gravity is locally effaced in a

A millisecond pulsar in a stellar triple system

Gravitationally bound three-body systems have been studied for hundreds of years and are common in our Galaxy. They show complex orbital interactions, which can constrain the compositions, masses and

Tests of the universality of free fall for strongly self-gravitating bodies with radio pulsars

In this paper, we review tests of the strong equivalence principle (SEP) derived from pulsar–white dwarf binary data. The extreme difference in the binding energy between both components and the

Strong-field tests of relativistic gravity and binary pulsars.

  • DamourTaylor
  • Physics
    Physical review. D, Particles and fields
  • 1992
A detailed account of the parametrized post-Keplerian'' (PPK) formalism, a general phenomenological framework designed to extract the maximum possible information from pulsar timing and pulse-structure data, and how it can be combined with the predictions of a rather generic class of tensor biscalar theories to bring together tests based on observations of several different pulsars.

Tensor-multi-scalar theories of gravitation

A generic class of theories where gravity is mediated by one tensor field together with an arbitrary number of scalar fields is considered. The predictions of these theories are worked out in four

Conquering systematics in the timing of the pulsar triple system J0337+1715: Towards a unique and robust test of the strong equivalence principle

PSR J0337+1715 is a millisecond radio pulsar in a hierarchical stellar triple system containing two white dwarfs. The pulsar orbits the inner white dwarf every 1.6 days. In turn, this inner binary

A test of general relativity using radio links with the Cassini spacecraft

A measurement of the frequency shift of radio photons to and from the Cassini spacecraft as they passed near the Sun agrees with the predictions of standard general relativity with a sensitivity that approaches the level at which, theoretically, deviations are expected in some cosmological models.

Discovery of Three Wide-Orbit Binary Pulsars: Implications for Binary Evolution and Equivalence Principles

We report the discovery of three binary millisecond pulsars during the Parkes Multibeam Pulsar Survey of the Galactic plane. The objects are highly recycled and are in orbits of many tens of days

New tests of the strong equivalence principle using binary-pulsar data.

It is pointed out that existing observational data on the class of small-eccentricity long-orbital-period binary pulsars already provide a limit which goes beyond corresponding solar-system limits in probing strong-gravitational-field effects.