What question did this study set out to answer?

The aim is to develop a new search strategy for identifying extreme mass ratio inspirals in gravitational wave data.

April 4, 2026Open Access

Searching for extreme mass ratio inspirals in LISA: from identification to parameter estimation

Key Points

The aim is to develop a new search strategy for identifying extreme mass ratio inspirals in gravitational wave data.
Designed a novel search strategy for EMRI detection.
Utilized noisy data from the LISA observatory.
Performed parameter estimation based on the identified signals.
Successfully identified EMRI signals from complex data.
Improved the approach allows for wider priors in the search space.
Demonstrates potential for better extraction of EMRIs from future LISA data.

Abstract

The Laser Interferometer Space Antenna (LISA) is a planned space-based observatory designed to detect gravitational waves (GWs) within the millihertz frequency range. LISA is anticipated to observe the inspiral of compact objects into black holes at the centers of galaxies, so called extreme-mass-ratio inspirals (EMRIs). However, the extraction of these long-lived complex signals is challenging due to the large size and multimodality of the search space. In this study, we introduce a new search strategy that allows us to find EMRI signals in noisy data from wide priors all the way to performing parameter estimation. This work is an important step in understanding how to extract EMRIs from future LISA data.

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