2021 Fiscal Year Annual Research Report
Gravitational-wave astrophysics with Advanced LIGO and Virgo's O3 and O4 experiments.
| Project/Area Number |
18H03698
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
カンノン キップ 東京大学, 大学院理学系研究科(理学部), 教授 (50777886)
|
|---|
| Project Period (FY) |
2018-04-01 – 2023-03-31
|
| Keywords | gravitational wave / black hole / neutron star / time series analysis / statistical inference |
|---|
| Outline of Annual Research Achievements |
Group members completed their contributions to LIGO and Virgo's O3 science run, and published their results. Group members participated in LIGO/Virgo collaboration meetings, and scientific conferences in Japan. Specifically the following objectives were achieved or partially achieved: 1. Modified the GstLAL gravitational-wave detection software to run on KAGRA computer systems in Japan. 2. An effort to improve the computational efficiency of the GstLAL detection software by developing algorithms for hierarchical cuts developed and tested several approaches, but not were found to be acceptable. 3. We completed and deployed a numerical model of the sensitivity and selection biases of the GstLAL GW detection system, removing the need to measure these using simulations. 4. We conducted a search for bursts of gravitational Cherenkov radiation.
|
| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
Almost all projects were completed as intended. The most significant project to not be completed was the effort to introduce hierarchical data selection cuts into the GstLAL gravitational-wave signal detection software for the purpose of reducing its computational cost. Although no satisfactory algorithm was found to achieve this, many lessons were learned from the effort and we expect that a renewed effort will be successful in the future.
|
| Strategy for Future Research Activity |
New Master's students joined the group whose interests will take us in new directions. We are beginning to study how observations of gravitational waves from neutron star collisions can be used to measure the properties of dense nuclear matter. We are investigating generalizations of signal models for gravitational waves from compact object collisions that can be used to test such signals for consistency with General Relativity.
|
