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dc.contributor.authorYunes, Nicolás
dc.contributor.authorYagi, Kent
dc.contributor.authorPretorius, Frans
dc.date.accessioned2017-02-14T23:14:28Z
dc.date.available2017-02-14T23:14:28Z
dc.date.issued2016-10
dc.identifier.citationYunes, Nicolas, Kent Yagi, and Frans Pretorius. "Theoretical physics implications of the binary black-hole mergers GW150914 and GW151226." Physical Review D 94, no. 8 (October 2016). DOI:https://dx.doi.org/10.1103/PhysRevD.94.084002.en_US
dc.identifier.issn2470-0010
dc.identifier.urihttps://scholarworks.montana.edu/xmlui/handle/1/12609
dc.description.abstractThe gravitational wave observations GW150914 and GW151226 by Advanced LIGO provide the first opportunity to learn about physics in the extreme gravity environment of coalescing binary black holes. The LIGO Scientific Collaboration and the Virgo Collaboration have verified that this observation is consistent with Einstein\'s theory of general relativity, constraining the presence of certain parametric anomalies in the signal. This paper expands their analysis to a larger class of anomalies, highlighting the inferences that can be drawn on nonstandard theoretical physics mechanisms that could otherwise have affected the observed signals. We find that these gravitational wave events constrain a plethora of mechanisms associated with the generation and propagation of gravitational waves, including the activation of scalar fields, gravitational leakage into large extra dimensions, the variability of Newton\'s constant, the speed of gravity, a modified dispersion relation, gravitational Lorentz violation and the strong equivalence principle. Though other observations limit many of these mechanisms already, GW150914 and GW151226 are unique in that they are direct probes of dynamical strong-field gravity and of gravitational wave propagation. We also show that GW150914 constrains inferred properties of exotic compact object alternatives to Kerr black holes. We argue, however, that the true potential for GW150914 to both rule out exotic objects and constrain physics beyond general relativity is severely limited by the lack of understanding of the coalescence regime in almost all relevant modified gravity theories. This event thus significantly raises the bar that these theories have to pass, both in terms of having a sound theoretical underpinning and reaching the minimal level of being able to solve the equations of motion for binary merger events. We conclude with a discussion of the additional inferences that can be drawn if the lower-confidence observation of an electromagnetic counterpart to GW150914 holds true, or such a coincidence is observed with future events; this would provide dramatic constraints on the speed of gravity and gravitational Lorentz violation.en_US
dc.description.sponsorshipNational Science Foundation(PHY-1250636, PHY-1305682); JSPS; Simons Foundationen_US
dc.language.isoen_USen_US
dc.titleTheoretical physics implications of the binary black-hole mergers GW150914 and GW151226en_US
dc.typeArticleen_US
mus.citation.issue8en_US
mus.citation.journaltitlePhysical Review Den_US
mus.citation.volume94en_US
mus.identifier.categoryPhysics & Mathematicsen_US
mus.identifier.doi10.1103/PhysRevD.94.084002en_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.departmentPhysics.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.data.thumbpage26en_US


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