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No evidence of kinetic screening in simulations of merging binary neutron stars beyond general relativity

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arxiv 2107.05648 v2 pith:CTV25Y32 submitted 2021-07-12 gr-qc hep-th

No evidence of kinetic screening in simulations of merging binary neutron stars beyond general relativity

Miguel Bezares , Ricard Aguilera-Miret , Lotte ter Haar , Marco Crisostomi , Carlos Palenzuela , Enrico Barausse This is my paper
classification gr-qc hep-th
keywords screeningscalarbinaryneutronquadrupoleresultsscalessimulations
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We have conducted fully relativistic simulations in a class of scalar-tensor theories with derivative self-interactions and screening of local scales. By using high-resolution shock-capturing methods and a non-vanishing shift vector, we have managed to avoid issues plaguing similar attempts in the past. We have first confirmed recent results by ourselves in spherical symmetry, obtained with an approximate approach and pointing at a partial breakdown of the screening in black-hole collapse. Then, we considered the late inspiral and merger of binary neutron stars. We found that screening tends to suppress the (subdominant) dipole scalar emission, but not the (dominant) quadrupole scalar mode. Our results point at quadrupole scalar signals as large as (or even larger than) in Fierz-Jordan-Brans-Dicke theories with the same conformal coupling, for strong-coupling scales in the MeV range that we can simulate.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Towards long and accurate numerical relativity waveforms of binary black holes beyond general relativity

    gr-qc 2026-07 conditional novelty 6.5

    Spectral methods plus comoving fixing-the-equations drivers yield 40+ cycle equal-mass sGB binary waveforms with phase error ≲1 rad, distinguishable from GR and merging earlier.

  2. High-accuracy drivers to simulate black hole binaries beyond general relativity with the fixing-the-equations approach

    gr-qc 2026-07 conditional novelty 6.0

    Comoving tensor-aware driver equations in SpECTRE yield ~40-cycle sGB binary waveforms with O(1) rad phase error and eccentricity ≲10^{-3}, free of spurious spin growth.

  3. Scalar emission from binary neutron stars in scalar-tensor theories with kinetic screening

    gr-qc 2026-05 unverdicted novelty 6.0

    Kinetic screening non-monotonically suppresses or enhances scalar quadrupolar emission from equal-mass neutron star binaries depending on screening radius versus wavelength, with a dipole re-emerging linearly with mas...

  4. Tests of General Relativity with GW230529: a neutron star merging with a lower mass-gap compact object

    gr-qc 2024-06 conditional novelty 5.0

    Parameterized inspiral tests on GW230529 find consistency with GR, with |δφ̂_{-2}| ≲ 8×10^{-5} and ℓ_GB ≲ 0.51 M_⊙ in ESGB theories.