Current browse context:
gr-qc
Change to browse by:
References & Citations
General Relativity and Quantum Cosmology
Title: Dissecting the Stochastic Gravitational Wave Background with Astrometry
(Submitted on 5 Dec 2023 (v1), last revised 3 May 2024 (this version, v2))
Abstract: Astrometry, the precise measurement of star motions, offers an alternative avenue to investigate low-frequency gravitational waves through the spatial deflection of photons, complementing pulsar timing arrays reliant on timing residuals. Upcoming data from Gaia and Roman can not only cross-check pulsar timing array findings but also explore the uncharted frequency range bridging pulsar timing arrays and LISA. We present an analytical framework to evaluate the feasibility of detecting a gravitational wave background, considering measurement noise and the intrinsic variability of the stochastic background. Furthermore, we highlight astrometry's crucial role in uncovering key properties of the gravitational wave background, such as spectral index and chirality, employing information-matrix analysis. Finally, we simulate the emergence of quadrupolar correlations, commonly referred to as the generalized Hellings-Downs curves.
Submission history
From: Xiao Xue [view email][v1] Tue, 5 Dec 2023 19:00:04 GMT (1176kb,D)
[v2] Fri, 3 May 2024 12:34:59 GMT (1092kb,D)
Link back to: arXiv, form interface, contact.