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Abstract: The effect of a narrow-band isotropic stochastic GW background on pulsartiming and astrometric measurements is studied. Such a background appears insome theories of gravity. We show that the existing millisecond pulsar timingaccuracy $\sim 0.2 m{\mu s}$ strongly constrains possible observationalconsequences of theory of massive gravity with spontaneous Lorentz braking\cite{dtt:2005}, essentially ruling out significant contribution of massivegravitons to the local dark halo density. The present-day accuracy ofastrometrical measurements $\sim 100 m{\mu as}$ sets less stringentconstraints on this theory.



Autor: Maxim Pshirkov, Artem Tuntsov, Konstantin A. Postnov

Fuente: https://arxiv.org/







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