Non-parametric characterization of gravitational-wave polarizations

Flamant, Julien; Chainais, Pierre; Chassande-Mottin, Eric; Feng, Fangchen; Le Bihan, Nicolas

Type de document :

Communication dans un congrès avec actes

DOI :

10.23919/EUSIPCO.2018.8552942

Titre :

Non-parametric characterization of gravitational-wave polarizations

Auteur(s) :

Flamant, Julien [Auteur]
Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 [CRIStAL]
Chainais, Pierre [Auteur]

Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 [CRIStAL]
Chassande-Mottin, Eric [Auteur]
APC - Gravitation [APC-Gravitation]
Feng, Fangchen [Auteur]
APC - Gravitation [APC-Gravitation]
Le Bihan, Nicolas [Auteur]
GIPSA - Communication Information and Complex Systems [GIPSA-CICS]

Titre de la manifestation scientifique :

EUSIPCO 2018 - 26th European Signal Processing Conference

Ville :

Rome

Pays :

Italie

Date de début de la manifestation scientifique :

2018-09-03

Éditeur :

IEEE

Discipline(s) HAL :

Sciences de l'ingénieur [physics]/Traitement du signal et de l'image [eess.SP]

Résumé en anglais : [en]

Gravitational waves are polarized. Their polarization is essential to characterize the physical and dynamical properties of the source i.e., a coalescing binary of two compact objects such as black holes or neutron stars. ...
Lire la suite >Gravitational waves are polarized. Their polarization is essential to characterize the physical and dynamical properties of the source i.e., a coalescing binary of two compact objects such as black holes or neutron stars. Observations with two or more non coaligned detectors like Virgo and LIGO allow to reconstruct the two polarization components usually denoted by h+(t) and h×(t). The amplitude and phase relationship between the two components is related to the source orientation with respect to the observer. Therefore the evolution of the polarization pattern provides evidence for changes in the orientation due to precession or nutation of the binary. Usually, some specific direct dynamical model is exploited to identify the physical parameters of such binaries. Recently, a new framework for the time-frequency analysis of bivariate signals based on a quaternion Fourier transform has been introduced in [1]. It permits to analyze the bivariate signal combining h+(t) and h×(t) by defining its quaternion embedding as well as a set of non-parametric observables, namely Stokes parameters. These parameters are remarkably capable of measuring fine properties of the source, in particular by deciphering precession, without close bounds to a specific dynamical model.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Projet ANR :

Graphes d'ondelettes et leur application à la détection directe des ondes gravitationnelles

Collections :

Centre de Recherche en Informatique, Signal et Automatique de Lille (CRIStAL) - UMR 9189

Source :

Harvested from HAL

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