Speaker: Zhenwei Lyu (Dalian University of Technology)
Abstract: Wet extreme mass-ratio inspirals (wet EMRIs) occur when stellar-mass black holes spiral into supermassive black hole（SMBH） within gas-rich AGNs, emitting gravitational waves detectable by LISA, TianQin, and Taiji. Their interaction with accretion disks produces transient electromagnetic signals, enabling multi-messenger observations that probe disk physics and environments. Wet EMRIs allow ultra-precise measurements of SMBH mass and spin (~10^−4−10^−6), improving EM calibration and informing jet models. As bright and dark sirens, wet EMRIs also support percent-level Hubble constant measurements for cosmology.
Time: 09:00-10:00, 2026-01-12
Location: R1710, SIMIS
Introduction to the speaker: Zhenwei Lyu (吕振伟) is an Assistant Professor at Dalian University of Technology since 2024. From 2022 to 2024, he was a Boya Fellow at the Kavli Institute for Astronomy and Astrophysics (KIAA), Peking University. He received his Ph.D. in 2022 from the University of Guelph, under the supervision of Prof. Huan Yang. His research interests lie in gravitational wave data analysis and its applications in astrophysics and fundamental physics.
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