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Article Dans Une Revue Scientific Reports Année : 2024

Pinpointing gravitational waves via astrometric gravitational wave antennas

Mariateresa Crosta
  • Fonction : Auteur
Mario Gilberto Lattanzi
  • Fonction : Auteur
Mario Gai
  • Fonction : Auteur
Qi Zhaoxiang
  • Fonction : Auteur
Alberto Vecchiato
  • Fonction : Auteur

Résumé

The direct detection of gravitational waves by ground-based optical interferometers has opened a new window in astronomy. Besides, the sensitivity of these linear detectors to the direction of arrival of an incoming gravitational wave is limited compared to current prospects of high-precision, space-based, astrometry. Indeed, advanced methods of differential relativistic astrometry offer a unique opportunity to overcome that situation. Here, we present a novel concept for a gravitational wave antenna that uses angles between close pairs of point-like sources as natural (angular) “arms” to characterise the very tiny variations in angular separations induced by a passing gravitational wave. The proposed new astrometric gravitational wave observable proves to be a powerful tool to substantially enhance the effect of gravitational waves of different strengths by exploiting optical resolution to the fullest. Then, by optically multiplexing three (or more) of such astrometric “arms”, it would be also possible to pinpoint source directions to unprecedented levels.
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Dates et versions

hal-04487697 , version 1 (06-03-2024)

Identifiants

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Mariateresa Crosta, Mario Gilberto Lattanzi, Christophe Le Poncin-Lafitte, Mario Gai, Qi Zhaoxiang, et al.. Pinpointing gravitational waves via astrometric gravitational wave antennas. Scientific Reports, 2024, 14 (1), pp.5074. ⟨10.1038/s41598-024-55671-9⟩. ⟨hal-04487697⟩
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