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Figure 20
Figure 20: The dominant quadrupolar component of the gravitational ψ4 scalar for an equal-mass, non-spinning NS binary with individual baryon masses of 1.625M ⊙. The solid (black) curve refers to GR, and the dashed (red) curve to a scalar-tensor theory with − 5 β∕(4π) = − 4.5, φ0 = 10. Image reproduced with permission from [73], copyright by APS.