The recent LIGO detection of gravitational waves from black-hole binaries offers the exciting possibility of testing gravitational theories in the previously inaccessible strong-field, highly relativistic regime. While the LIGO detections are so far consistent with the predictions of General Relativity, future gravitational-wave observations will allow us to explore this regime to unprecedented accuracy. One of the generic predictions of theories of gravity that extend General Relativity is the violation of the strong equivalence principle, i.e. strongly gravitating bodies such as neutron stars and black holes follow trajectories that depend on their nature and composition. This has deep consequences for gravitational-wave emission, which takes place with additional degrees of freedom besides the tensor polarizations of General Relativity. I will briefly review the formalism needed to describe these extra emission channels, and show that binary black-hole observations probe a set of gravitational theories that are largely disjoint from those that are testable with binary pulsars or neutron stars. © Copyright owned by the author(s).

Testing the strong equivalence principle with gravitational-wave observations of binary black holes / Barausse, Enrico. - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - 2017:(2017), pp. 1-8. ((Intervento presentato al convegno 3rd International Symposium on ""Quest for the Origin of Particles and the Universe"", KMI 2017 tenutosi a Nagoya UniversityNagoya; Japan nel 5 January 2017 through 7 January 2017 [10.22323/1.294.0029].

Testing the strong equivalence principle with gravitational-wave observations of binary black holes

Barausse, Enrico
2017

Abstract

The recent LIGO detection of gravitational waves from black-hole binaries offers the exciting possibility of testing gravitational theories in the previously inaccessible strong-field, highly relativistic regime. While the LIGO detections are so far consistent with the predictions of General Relativity, future gravitational-wave observations will allow us to explore this regime to unprecedented accuracy. One of the generic predictions of theories of gravity that extend General Relativity is the violation of the strong equivalence principle, i.e. strongly gravitating bodies such as neutron stars and black holes follow trajectories that depend on their nature and composition. This has deep consequences for gravitational-wave emission, which takes place with additional degrees of freedom besides the tensor polarizations of General Relativity. I will briefly review the formalism needed to describe these extra emission channels, and show that binary black-hole observations probe a set of gravitational theories that are largely disjoint from those that are testable with binary pulsars or neutron stars. © Copyright owned by the author(s).
2017
1
8
https://pos.sissa.it/294/029/
Sissa Medialab Srl
Barausse, Enrico
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11767/89725
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