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Gravitational waves from cosmic strings in LISA: reconstruction pipeline and physics interpretation
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abstract
We initiate the LISA template databank for stochastic gravitational wave backgrounds sourced by cosmic strings. We include two templates, an analytical template, which enables more flexible searches, and a numerical template derived directly from large Nambu-Goto simulations of string networks. Using searches based on these templates, we forecast the parameter space within the reach of the experiment and the precision with which their parameters will be reconstructed, provided a signal is observed. The reconstruction permits probing the Hubble expansion and new relativistic DoF in the early universe. We quantify the impact that astrophysical foregrounds can have on these searches. Finally, we discuss the impact that these observations would have on our understanding of the fundamental models behind the string networks. Overall, we prove that LISA has great potential for probing cosmic string models and may reach tensions as low as $G\mu =10^{-16} - 10^{-17} $, which translates into energy scales of the order $10^{11}~\text{GeV}$.
Forward citations
Cited by 7 Pith papers
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Do Cosmic String Segments Emit Gravitational Waves?
In realistic metastable cosmic string scenarios, thermal fluctuations on the string prevent endpoint monopoles from reaching relativistic speeds, so string segments contribute negligibly to the gravitational wave background.
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LISA can reconstruct metastable cosmic-string tension and lifetime when it samples the tail-to-plateau transition, with residual κ_CS sensitivity possible even in high-SNR plateau-like spectra.
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Localized Vector Modes on Local Cosmic Strings
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Inflationary magnetogenesis beyond slow-roll and its induced gravitational waves
In the Ratra inflationary magnetogenesis model, a brief non-slow-roll phase amplifies the magnetic field power spectrum with maximal slope 4.75, and the induced gravitational wave background has a characteristic plate...
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Searching Stochastic Gravitational Wave Background Landscape Across Frequency Bands
A hybrid cosmic string–domain wall model can fit the NANOGrav 15-year signal, and its high-frequency tail lies within LISA's projected reach, making the interpretation testable.
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Cosmic string gravitational wave backgrounds at LISA: I. Signal survey, template reconstruction, and model comparison
As provided, the manuscript body (random lasing) does not correspond to the abstract (cosmic string gravitational wave backgrounds at LISA), leaving the abstract's quantitative claims unsupported by any accessible text.
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Science of the LISA mission: A Summary for the European Strategy for Particle Physics
Four LISA science objectives are summarized for the European particle physics strategy, covering gravity tests, standard sirens, and TeV-scale stochastic gravitational wave backgrounds.
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