TY - JOUR

T1 - New binary pulsar constraints on Einstein- ther theory after GW170817

AU - Gupta, Toral

AU - Herrero-Valea, Mario

AU - Blas, Diego

AU - Barausse, Enrico

AU - Cornish, Neil

AU - Yagi, Kent

AU - Yunes, Nicolas

N1 - Publisher Copyright:
© 2021 IOP Publishing Ltd.

PY - 2021/10/1

Y1 - 2021/10/1

N2 - 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 symmetry. Observations of binary systems involving at least 1 ms pulsar have been used to place bounds on the parameters of Einstein- ther theory, a gravitational theory that violates Lorentz symmetry at low energies via a preferred and dynamical time threading of the spacetime manifold. However, these studies did not cover the region of parameter space that is still viable after the recent bounds on the speed of gravitational waves from GW170817/GRB170817A. The restricted coverage was due to limitations in the methods used to compute the pulsar 'sensitivities', which parameterize violations of the strong-equivalence principle in these systems. We extend here the calculation of pulsar sensitivities to the parameter space of Einstein- ther theory that remains viable after GW170817/GRB170817A. We show that observations of the damping of the period of quasi-circular binary pulsars and of the triple system PSR J0337+1715 further constrain the viable parameter space by about an order of magnitude over previous constraints.

AB - 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 symmetry. Observations of binary systems involving at least 1 ms pulsar have been used to place bounds on the parameters of Einstein- ther theory, a gravitational theory that violates Lorentz symmetry at low energies via a preferred and dynamical time threading of the spacetime manifold. However, these studies did not cover the region of parameter space that is still viable after the recent bounds on the speed of gravitational waves from GW170817/GRB170817A. The restricted coverage was due to limitations in the methods used to compute the pulsar 'sensitivities', which parameterize violations of the strong-equivalence principle in these systems. We extend here the calculation of pulsar sensitivities to the parameter space of Einstein- ther theory that remains viable after GW170817/GRB170817A. We show that observations of the damping of the period of quasi-circular binary pulsars and of the triple system PSR J0337+1715 further constrain the viable parameter space by about an order of magnitude over previous constraints.

KW - general relativity

KW - gravitational waves

KW - neutron stars

UR - http://inspirehep.net/record/1857836

UR - http://www.scopus.com/inward/record.url?scp=85114836857&partnerID=8YFLogxK

U2 - 10.1088/1361-6382/ac1a69

DO - 10.1088/1361-6382/ac1a69

M3 - Article

VL - 38

JO - Classical and Quantum Gravity

JF - Classical and Quantum Gravity

SN - 0264-9381

IS - 19

M1 - 195003

ER -