Testing modified gravity at cosmological distances with LISA standard sirens
نویسندگان
چکیده
منابع مشابه
Testing Gravity at Short Distances
Various theories of physics beyond the Standard Model, including attempts to resolve the hierarchy problem, include deviations from Newtonian gravity at short distances. Tabletop measurements of gravity can provide constraints on these theories. We have built an apparatus to measure the force between masses separated by tens of microns. The experiment utilizes a micromachined silicon cantilever...
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The gravitational waves (GW) emitted during the coalescence of supermassive black holes (SMBHs) in the mass range ∼ (10–10)M⊙/(1+z) will be detectable out to high redshifts with the future Laser Interferometric Space Antenna (LISA). The distance and direction to these “standard sirens” can be inferred directly from the GW signal, with a precision that depends on the masses, spins and geometry o...
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A gravitational observatory such as LISA will detect coalescing pairs of massive black holes, accurately measure their luminosity distance and help identify a host galaxy or an electromagnetic counterpart. If dark energy is a manifestation of modified gravity on large scales, gravitational waves from cosmologicallydistant spacetime sirens are direct probes of this new physics. For example, a gr...
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Electromagnetic (EM) counterparts to supermassive black hole binary mergers observed by LISA can be localized to within the field of view of astronomical instruments (∼ 10deg) hours to weeks prior to coalescence. The temporal coincidence of any prompt EM counterpart with a gravitationally-timed merger may offer the best chance of identifying a unique host galaxy. We discuss the challenges posed...
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We investigate the possible bounds which could be placed on alternative theories of gravity using gravitational wave detection from inspiralling compact binaries with the proposed LISA space interferometer. Specifically, we estimate lower bounds on the coupling parameter ω of scalar-tensor theories of the Brans-Dicke type and on the Compton wavelength of the graviton λg in hypothetical massive ...
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ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2019
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2019/07/024