A test for LISA foreground Gaussianity and stationarity. I. Galactic white-dwarf binaries
Upcoming space-based gravitational-wave detectors will be sensitive to millions and resolve tens of thousands of stellar-mass binary systems at mHz frequencies. The vast majority of these will be double white dwarfs in our Galaxy. The greatest part will remain unresolved, forming an incoherent stoch...
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| creator | Buscicchio, Riccardo Klein, Antoine Korol, Valeriya Di Renzo, Francesco Moore, Christopher J Gerosa, Davide Carzaniga, Alessandro |
| description | Upcoming space-based gravitational-wave detectors will be sensitive to
millions and resolve tens of thousands of stellar-mass binary systems at mHz
frequencies. The vast majority of these will be double white dwarfs in our
Galaxy. The greatest part will remain unresolved, forming an incoherent
stochastic foreground signal. Using state-of-the-art Galactic models for the
formation and evolution of binary white dwarfs and accurate LISA simulated
signals, we introduce a test for foreground Gaussianity and stationarity. We
explain the former with a new analytical modulation induced by the LISA
constellation motion and the intrinsic anisotropy of the source distribution.
By demodulating the foreground signal, we reveal a deviation from Gaussianity
in the 2-10 mHz frequency band. Our finding is crucial to design faithful data
models, i.e. unbiased likelihoods for both individual sources and astrophysical
foregrounds parameter estimation, and ultimately for an accurate interpretation
of the LISA data. |
| doi_str_mv | 10.48550/arxiv.2410.08263 |
| format | Article |
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millions and resolve tens of thousands of stellar-mass binary systems at mHz
frequencies. The vast majority of these will be double white dwarfs in our
Galaxy. The greatest part will remain unresolved, forming an incoherent
stochastic foreground signal. Using state-of-the-art Galactic models for the
formation and evolution of binary white dwarfs and accurate LISA simulated
signals, we introduce a test for foreground Gaussianity and stationarity. We
explain the former with a new analytical modulation induced by the LISA
constellation motion and the intrinsic anisotropy of the source distribution.
By demodulating the foreground signal, we reveal a deviation from Gaussianity
in the 2-10 mHz frequency band. Our finding is crucial to design faithful data
models, i.e. unbiased likelihoods for both individual sources and astrophysical
foregrounds parameter estimation, and ultimately for an accurate interpretation
of the LISA data.</description><identifier>DOI: 10.48550/arxiv.2410.08263</identifier><language>eng</language><subject>Physics - General Relativity and Quantum Cosmology ; Physics - High Energy Astrophysical Phenomena ; Physics - Instrumentation and Methods for Astrophysics</subject><creationdate>2024-10</creationdate><rights>http://creativecommons.org/licenses/by/4.0</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>228,230,776,881</link.rule.ids><linktorsrc>$$Uhttps://arxiv.org/abs/2410.08263$$EView_record_in_Cornell_University$$FView_record_in_$$GCornell_University$$Hfree_for_read</linktorsrc><backlink>$$Uhttps://doi.org/10.48550/arXiv.2410.08263$$DView paper in arXiv$$Hfree_for_read</backlink></links><search><creatorcontrib>Buscicchio, Riccardo</creatorcontrib><creatorcontrib>Klein, Antoine</creatorcontrib><creatorcontrib>Korol, Valeriya</creatorcontrib><creatorcontrib>Di Renzo, Francesco</creatorcontrib><creatorcontrib>Moore, Christopher J</creatorcontrib><creatorcontrib>Gerosa, Davide</creatorcontrib><creatorcontrib>Carzaniga, Alessandro</creatorcontrib><title>A test for LISA foreground Gaussianity and stationarity. I. Galactic white-dwarf binaries</title><description>Upcoming space-based gravitational-wave detectors will be sensitive to
millions and resolve tens of thousands of stellar-mass binary systems at mHz
frequencies. The vast majority of these will be double white dwarfs in our
Galaxy. The greatest part will remain unresolved, forming an incoherent
stochastic foreground signal. Using state-of-the-art Galactic models for the
formation and evolution of binary white dwarfs and accurate LISA simulated
signals, we introduce a test for foreground Gaussianity and stationarity. We
explain the former with a new analytical modulation induced by the LISA
constellation motion and the intrinsic anisotropy of the source distribution.
By demodulating the foreground signal, we reveal a deviation from Gaussianity
in the 2-10 mHz frequency band. Our finding is crucial to design faithful data
models, i.e. unbiased likelihoods for both individual sources and astrophysical
foregrounds parameter estimation, and ultimately for an accurate interpretation
of the LISA data.</description><subject>Physics - General Relativity and Quantum Cosmology</subject><subject>Physics - High Energy Astrophysical Phenomena</subject><subject>Physics - Instrumentation and Methods for Astrophysics</subject><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><sourceid>GOX</sourceid><recordid>eNqFjrsOgkAQRbexMOoHWDk_wIo8DC0xPkjstLEiAyw6CYLZHUT-3oXYW91HTnGEWG5cGURh6K5Rf-gtvcAebuRt_am4xcDKMJSNhnNyiYei7rpp6wKO2BpDWBP3gHYbRqamRm0PCYm0QIU5Uw7dg1g5RYe6hIwGQpm5mJRYGbX45UysDvvr7uSMEulL0xN1nw4y6Sjj_ye-AYU_Qg</recordid><startdate>20241010</startdate><enddate>20241010</enddate><creator>Buscicchio, Riccardo</creator><creator>Klein, Antoine</creator><creator>Korol, Valeriya</creator><creator>Di Renzo, Francesco</creator><creator>Moore, Christopher J</creator><creator>Gerosa, Davide</creator><creator>Carzaniga, Alessandro</creator><scope>GOX</scope></search><sort><creationdate>20241010</creationdate><title>A test for LISA foreground Gaussianity and stationarity. I. Galactic white-dwarf binaries</title><author>Buscicchio, Riccardo ; Klein, Antoine ; Korol, Valeriya ; Di Renzo, Francesco ; Moore, Christopher J ; Gerosa, Davide ; Carzaniga, Alessandro</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-arxiv_primary_2410_082633</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><topic>Physics - General Relativity and Quantum Cosmology</topic><topic>Physics - High Energy Astrophysical Phenomena</topic><topic>Physics - Instrumentation and Methods for Astrophysics</topic><toplevel>online_resources</toplevel><creatorcontrib>Buscicchio, Riccardo</creatorcontrib><creatorcontrib>Klein, Antoine</creatorcontrib><creatorcontrib>Korol, Valeriya</creatorcontrib><creatorcontrib>Di Renzo, Francesco</creatorcontrib><creatorcontrib>Moore, Christopher J</creatorcontrib><creatorcontrib>Gerosa, Davide</creatorcontrib><creatorcontrib>Carzaniga, Alessandro</creatorcontrib><collection>arXiv.org</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Buscicchio, Riccardo</au><au>Klein, Antoine</au><au>Korol, Valeriya</au><au>Di Renzo, Francesco</au><au>Moore, Christopher J</au><au>Gerosa, Davide</au><au>Carzaniga, Alessandro</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A test for LISA foreground Gaussianity and stationarity. I. Galactic white-dwarf binaries</atitle><date>2024-10-10</date><risdate>2024</risdate><abstract>Upcoming space-based gravitational-wave detectors will be sensitive to
millions and resolve tens of thousands of stellar-mass binary systems at mHz
frequencies. The vast majority of these will be double white dwarfs in our
Galaxy. The greatest part will remain unresolved, forming an incoherent
stochastic foreground signal. Using state-of-the-art Galactic models for the
formation and evolution of binary white dwarfs and accurate LISA simulated
signals, we introduce a test for foreground Gaussianity and stationarity. We
explain the former with a new analytical modulation induced by the LISA
constellation motion and the intrinsic anisotropy of the source distribution.
By demodulating the foreground signal, we reveal a deviation from Gaussianity
in the 2-10 mHz frequency band. Our finding is crucial to design faithful data
models, i.e. unbiased likelihoods for both individual sources and astrophysical
foregrounds parameter estimation, and ultimately for an accurate interpretation
of the LISA data.</abstract><doi>10.48550/arxiv.2410.08263</doi><oa>free_for_read</oa></addata></record> |
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| identifier | DOI: 10.48550/arxiv.2410.08263 |
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| subjects | Physics - General Relativity and Quantum Cosmology Physics - High Energy Astrophysical Phenomena Physics - Instrumentation and Methods for Astrophysics |
| title | A test for LISA foreground Gaussianity and stationarity. I. Galactic white-dwarf binaries |
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