# Are stellar-mass black-hole binaries too quiet for LISA?

## TL;DR

This paper reevaluates the detectability of stellar-mass black-hole binaries by LISA, finding that higher detection thresholds and detector performance constraints significantly lower expected event rates for multiband gravitational wave observations.

## Contribution

It introduces a revised higher signal-to-noise ratio threshold for LISA detection and emphasizes the impact of high-frequency detector performance and mission duration on event rate predictions.

## Key findings

- Revised detection threshold of $
ho_{thr} \\sim 15$ reduces expected events.
- High-frequency detector performance critically affects detection prospects.
- Longer mission duration increases the likelihood of observing these sources.

## Abstract

The progenitors of the high-mass black-hole mergers observed by LIGO and Virgo are potential LISA sources and promising candidates for multiband GW observations. In this letter, we consider the minimum signal-to-noise ratio these sources must have to be detected by LISA. Our revised threshold of $\rho_{\rm thr}\sim 15$ is higher than previous estimates, which significantly reduces the expected number of events. We also point out the importance of the detector performance at high-frequencies and the duration of the LISA mission, which both influence the event rate substantially.