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Testing the Universality of Free Fall with the Triple System J0337+1715

Published online by Cambridge University Press:  04 June 2018

A. M. Archibald ,
N. V. Gusinskaia ,
J. W. T. Hessels ,
D. R. Lorimer ,
R. S. Lynch ,
S. M. Ransom  and
I. H. Stairs
A. M. Archibald
Affiliation:
Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands email: A.Archibald@uva.nl
N. V. Gusinskaia
Affiliation:
Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands email: A.Archibald@uva.nl
J. W. T. Hessels
Affiliation:
Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands email: A.Archibald@uva.nl ASTRON, the Netherlands Institute for Radio Astronomy, Postbus 2, 7990 AA, Dwingeloo, The Netherlands
D. R. Lorimer
Affiliation:
Department of Physics and Astronomy, West Virginia University, PO Box 6315, Morgantown, WV 26506, USA Center for Gravitational Waves and Cosmology, West Virginia University, Chestnut Ridge Research Building, Morgantown, WV 26505, USA Green Bank Observatory, Green Bank, WV 24944, USA
R. S. Lynch
Affiliation:
Center for Gravitational Waves and Cosmology, West Virginia University, Chestnut Ridge Research Building, Morgantown, WV 26505, USA Green Bank Observatory, Green Bank, WV 24944, USA
S. M. Ransom
Affiliation:
National Radio Astronomy Observatory, Charlottesville, VA 22903, USA
I. H. Stairs
Affiliation:
Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
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Abstract

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The millisecond pulsar PSR J0337+1715 is in a mildly relativistic hierarchical triple system with two white dwarfs. This offers the possibility of testing the universality of free fall: does the neutron star fall with the same acceleration as the inner white dwarf in the gravity of the outer white dwarf? We have carried out an intensive pulsar timing campaign, yielding some 27000 pulse time-of-arrival (TOA) measurements with a median uncertainty of 1.2 μs. Here we describe our analysis procedure and timing model.

Keywords

gravitationrelativitymethods: data analysismethods: numericalmethods: statistical(stars:) pulsars: individual (PSR J0337+1715)

References

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