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A millisecond pulsar in a stellar triple system.

S M Ransom1, I H Stairs2, A M Archibald3

  • 1National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, Virginia 22903-2475, USA.

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|January 7, 2014
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This summary is machine-generated.

A triple system with a millisecond pulsar and two white dwarfs exhibits strong gravitational interactions. This system offers a unique laboratory for testing Einstein's theory of general relativity and the strong equivalence principle.

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Area of Science:

  • Astronomy and astrophysics
  • Gravitational physics
  • Stellar evolution

Background:

  • Three-body systems are common in galaxies and offer insights into celestial body properties and gravity theories.
  • Pulsar-containing triple systems are rare and provide precise measurements for testing physics.
  • Previous systems like PSR B1620-26 showed weak interactions, limiting their utility.

Purpose of the Study:

  • To report precision timing and multiwavelength observations of the hierarchical triple system PSR J0337+1715.
  • To analyze the strong gravitational interactions within this system.
  • To assess its potential for testing the strong equivalence principle of general relativity.

Main Methods:

  • Precision timing of the millisecond pulsar.
  • Multiwavelength observations of the system's components.
  • Analysis of orbital dynamics and gravitational interactions.

Main Results:

  • Determined the masses of the pulsar and its two white dwarf companions.
  • Measured the inclinations of the orbits to be approximately 39.2 degrees.
  • Observed unexpectedly coplanar and nearly circular orbits, suggesting an exotic evolutionary history.

Conclusions:

  • The strong gravitational field of the outer white dwarf accelerates the inner binary, including the neutron star.
  • PSR J0337+1715 serves as an ideal laboratory for testing the strong equivalence principle.
  • The system's orbital configuration challenges existing models of stellar system evolution.