Inferring spin tilts of binary black holes at formation with plus-era gravitational wave detectors

• DOI: 10.48550/arxiv.2308.05098
• Publication Date: 2023-01-01
• Authors: Sumeet Kulkarni; Nathan K. Johnson...; K. S. Phukon; N. V. Krishnendu; Anuradha Gupta
• Keywords: Black hole (networking)

The spin orientations of spinning binary black hole (BBH) mergers detected by ground-based gravitational wave detectors such as LIGO and Virgo can provide important clues about the formation binaries. However, these tilts, i.e., angles between vector each binary's orbital angular momentum vector, change due to precessional effects holes evolve from a large separation their merger. tilts inferred at frequency in sensitive band comparing signal with theoretical waveforms thus be significantly different when originally formed. These are well approximated many scenarios evolving BBH backwards time formally infinite separation. Using also places all binaries on an equal footing analyzing population properties. In this paper, we perform parameter estimation for simulated BBHs investigate differences one infers directly close merger those obtained back We select observations that configurations show particularly infinity. While may buried statistical noise current detections, future plus-era (A$+$ Virgo$+$) detectors, they easily distinguished some cases. consider infinity various morphologies endpoint up-down instability. particular, find able identify instability cases