Instrumental Improvements and Summary of Detected Events in a Decade of Gravitational Wave Astronomy.

by Park June-Gyu (Yonsei Universy, Seoul, Republic of Korea (South Korea))

Friday 6 Mar 2026, 11:15 → 12:15 Europe/Rome

Aula Conversi (Dip. di Fisica - Edificio G. Marconi)

The first direct detection of the gravitational-wave signal GW150914 marked the beginning of gravitational-wave astronomy, and 2025 is the 10th anniversary of this discovery. Over the past decade, the sensitivity of ground-based interferometric detectors has improved significantly through continuous instrumental upgrades. As a result, the observable distance of the detector network has increased from run to run. While only three events were detected during O1, by the end of the O4 observing run on 18 November 2025 a total of about 350 gravitational-wave events had been confirmed, and roughly 200 of them had been analyzed and included in published event catalogs. In this talk, I will review the instrumental development of ground-based gravitational-wave detectors over the last ten years, with a focus on key optical techniques, such as dual-recycling interferometer configurations and noise-mitigation schemes. I will also summarize the main classes of detected sources and discuss several representative events that characterize the first decade of gravitational-wave astronomy.

Remote connection available at:

https://uniroma1.zoom.us/j/87038625161?pwd=cEtGRjZNT2VWSlJIWmxaYmxSMDhRZz09

 

About the Speaker: Dr. June Gyu Park is a Tenure-track Assistant Professor at Yonsei University and a leading expert in quantum technologies and laser-based precision measurements for gravitational-wave detectors. He holds high-level leadership roles as a member of the KAGRA Steering Committee and as the KAGRA collaboration representative for the Korea Gravitational Wave Group (KGWG). His research focuses on advanced optical systems, leading the KAGRA squeezing subgroup and contributing to the optical layout design for the Einstein Telescope (ET).

2026Sapienza_Jpark_rev.pdf