Uncovering stochastic gravitational-wave backgrounds with LISA
| Autor: | Baghi, Quentin, Karnesis, Nikolaos, Bayle, Jean-Baptiste, Besançon, Marc, Inchauspé, Henri |
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| Přispěvatelé: | Département de Physique des Particules (ex SPP) (DPhP), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay |
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: |
observatory
density spectral noise LISA gravitational radiation stochastic [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc] FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) Bayesian detector network General Relativity and Quantum Cosmology gravitational radiation background pulsar |
| Zdroj: | 57th Rencontres de Moriond on Gravitation 57th Rencontres de Moriond on Gravitation, Mar 2023, La Thuile, Italy |
| Popis: | Finding a stochastic gravitational-wave background (SGWB) of astrophysical or primordial origin is one of the quests of current and future gravitational-wave observatories. While detector networks such as LIGO-Virgo-Kagra or pulsar timing arrays can use cross-correlations to tell instrumental noise and SGWB apart, LISA is likely to be the only flying detector of its kind in 2035. This particularity poses a challenge for data analysis. To tackle it, we present a strategy based on Bayesian model selection. We use a flexible noise power spectral density~(PSD) model and the knowledge of noise and signal transfer functions to allow SGWBs detection when the noise PSD is unknown. With this technique, we then probe the parameter space accessible by LISA for power-law SGWB shapes. 5 pages, 1 figure, contribution to the 2023 Gravitation session of the 57th Rencontres de Moriond |
| Databáze: | OpenAIRE |
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