期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 11, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2019/11/017
关键词
gravitational waves / experiments; primordial gravitational waves (theory)
资金
- COST Action Gravitational waves, black holes and fundamental physics [CA16104]
- ERC-AdG-2015 grant [694896]
- Swiss National Science Foundation (SNSF)
- Spanish MINECOs Centro de Excelencia Severo Ocho Programme [SEV-2016-0579]
- European Unions Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant [713366]
- STFC [ST/P00055X/1]
- Science and Technology Facilities Council [ST/P00055X/1] Funding Source: researchfish
- STFC [ST/P00055X/1] Funding Source: UKRI
We present a set of tools to assess the capabilities of LISA to detect and reconstruct the spectral shape and amplitude of a stochastic gravitational wave background (SGWB). We first provide the LISA power-law sensitivity curve and binned power-law sensitivity curves, based on the latest updates on the LISA design. These curves are useful to make a qualitative assessment of the detection and reconstruction prospects of a SGWB. For a quantitative reconstruction of a SGWB with arbitrary power spectrum shape, we propose a novel data analysis technique: by means of an automatized adaptive procedure, we conveniently split the LISA sensitivity band into frequency bins, and fit the data inside each bin with a power law signal plus a model of the instrumental noise. We apply the procedure to SGWB signals with a variety of representative frequency profiles, and prove that LISA can reconstruct their spectral shape. Our procedure, implemented in the code SGWBinner, is suitable for homogeneous and isotropic SGWBs detectable at LISA, and it is also expected to work for other GW observatories.
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