Accuracy of numerical relativity waveforms with respect to space-based gravitational wave detectors

The same to laser interferometer gravitational-wave observatory (LIGO), matched filtering technique will be critical to data analysis of gravitational wave detection by space-based detectors including LISA, Taiji and Tianqin. Waveform templates are basis for such matched filtering technique. In order to construct ready-to-use waveform templates, numerical relativity waveforms are start point. So the accuracy issue of numerical relativity waveforms is critically important. There are many investigations about this issue with respect to LIGO. But unfortunately there are few results on this issue with respect to space-based detectors. The current paper investigates this problem. Our results indicate that the existing numerical relativity waveforms are as accurate as 99\% with respect to space-based detectors including LISA, Taiji and Tianqin. Such accuracy level is comparable to the one with respect to LIGO.