Publications

Citation

BibTex format

@article{Mentasti:2024:05/028,
author = {Mentasti, G and Contaldi, CR},
doi = {05/028},
journal = {Journal of Cosmology and Astroparticle Physics},
title = {Observing gravitational waves with solar system astrometry},
url = {http://dx.doi.org/10.1088/1475-7516/2024/05/028},
volume = {2024},
year = {2024}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The subtle influence of gravitational waves on the apparent positioning of celestial bodies offers novel observational windows [1,2,3,4]. We calculate the expected astrometric signal induced by an isotropic Stochastic Gravitational Wave Background (SGWB) in the short distance limit. Our focus is on the resultant proper motion of Solar System objects, a signal on the same time scales addressed by Pulsar Timing Arrays (PTA). We derive the corresponding astrometric deflection patterns, finding that they manifest as distinctive dipole and quadrupole correlations or, in some cases, may not be present. Our analysis encompasses both Einsteinian and non-Einsteinian polarisations. We estimate the upper limits for the amplitude of SGWBs that could be obtained by tracking the proper motions of large numbers of solar system objects such as asteroids. We find that for SGWBs with negative spectral indices, such as that generated by Super Massive Black Hole Binaries (SMBHB), the constraints from these observations could rival those from PTAs. With the Gaia satellite and the Vera C. Rubin Observatory poised to track an extensive sample of asteroids — ranging from Script O(105) to Script O(106), we highlight the significant future potential for similar surveys to contribute to our understanding of the SGWB.
AU  - Mentasti,G
AU  - Contaldi,CR
DO  - 05/028
PY  - 2024///
SN  - 1475-7516
TI  - Observing gravitational waves with solar system astrometry
T2  - Journal of Cosmology and Astroparticle Physics
UR  - http://dx.doi.org/10.1088/1475-7516/2024/05/028
UR  - http://hdl.handle.net/10044/1/112148
VL  - 2024
ER  -
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