Constraints on the massive graviton dark matter from pulsar timing and precision astrometry

Details Constraints on the massive graviton dark matter from pulsar timing and precision astrometry Constraints on the massive graviton dark matter from pulsar timing and precision astrometry

2008-05-11

arxiv.org/abs/0805.1519v2

Phys.Rev.Lett.101:261101,2008

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure; changes in content, references added, accepted for publication in PRL

Scientific paper

10.1103/PhysRevLett.101.261101

The effect of a narrow-band isotropic stochastic GW background on pulsar timing and astrometric measurements is studied. Such a background appears in some theories of gravity. We show that the existing millisecond pulsar timing accuracy ($\sim 0.2 \rm{\mu s}$) strongly constrains possible observational consequences of theory of massive gravity with spontaneous Lorentz braking \cite{dtt:2005}, essentially ruling out significant contribution of massive gravitons to the local dark halo density. The present-day accuracy of astrometrical measurements ($\sim 100 \rm{\mu as}$) sets less stringent constraints on this theory.

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