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Characterization of the seismic field at Virgo and improved estimates of Newtonian-noise suppression by recesses

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cris.lastimport.scopus2024-02-12T19:19:53Z
dc.abstract.enFluctuations of gravitational forces cause so-called Newtonian noise (NN) in gravitational-wave detectors which is expected to limit their low-frequency sensitivity in upcoming observing runs. Seismic NN is produced by seismic waves passing near a detector's suspended test masses. It is predicted to be the strongest contribution to NN. Modeling this contribution accurately is a major challenge. Arrays of seismometers were deployed at the Virgo site to characterize the seismic field near the four test masses. In this paper, we present results of a spectral analysis of the array data from one of Virgo's end buildings to identify dominant modes of the seismic field. Some of the modes can be associated with known seismic sources. Analyzing the modes over a range of frequencies, we provide a dispersion curve of Rayleigh waves. We find that the Rayleigh speed in the NN frequency band 10-20 Hz is very low (≲100 m s<SUP>-1</SUP>), which has important consequences for Virgo's seismic NN. Using the new speed estimate, we find that the recess formed under the suspended test masses by a basement level at the end buildings leads to a 10 fold reduction of seismic NN.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorBulik, Tomasz
dc.contributor.authorSingha, Ayatri
dc.contributor.authorHild, Stefan
dc.contributor.authorHarms, Jan
dc.contributor.authorFiori, Irene
dc.contributor.authorPaoletti, Federico
dc.contributor.authorBertolini, Alessandro
dc.contributor.authorCalloni, Enrico
dc.contributor.authorRosa, Rosario De
dc.contributor.authorErrico, Luciano
dc.contributor.authorGennai, Alberto
dc.contributor.authorTringali, Maria
dc.contributor.authorIdźkowski, Bartosz
dc.date.accessioned2024-01-24T19:07:44Z
dc.date.available2024-01-24T19:07:44Z
dc.date.copyright2021-07-10
dc.date.issued2021
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number24
dc.description.versionORIGINAL_AUTHOR
dc.description.volume38
dc.identifier.doi10.1088/1361-6382/AC348A
dc.identifier.issn0264-9381
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/102909
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2021CQGra..38x5007S
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofClassical and Quantum Gravity
dc.relation.pages245007
dc.rightsOther
dc.sciencecloudnosend
dc.titleCharacterization of the seismic field at Virgo and improved estimates of Newtonian-noise suppression by recesses
dc.typeJournalArticle
dspace.entity.typePublication