2023 Fiscal Year Research-status Report
Feedback interactions between galaxies in compact groups: photonic, leptonic and hadronic processes
| Project/Area Number |
22KF0246
|
|---|
| Allocation Type | Multi-year Fund |
|---|
| Research Institution | Osaka University |
|---|
Principal Investigator |
井上 芳幸 大阪大学, 大学院理学研究科, 准教授 (70733989)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
OWEN ELLIS 大阪大学, 大学院理学研究科, 外国人特別研究員
|
|---|
| Project Period (FY) |
2023-03-08 – 2025-03-31
|
| Keywords | Hadronic interactions / galaxy evolution / cosmic rays / magnetic fields |
|---|
| Outline of Annual Research Achievements |
Research in FY2023 has focused on constructing detailed microphysical models and emission signatures from the physical media conditions expected in starburst galaxies and the intergalactic medium. This has put focus on ultra-high-energy particle scattering and propagation in cosmological magnetic field structures, and intermediate to high energy particle interactions in cosmological and astrophysical radiation and density fields. Some of these microphysical interaction models have been interfaced into magnetohydrodynamical simulation codes, with validation of these code implementations still ongoing.
|
| Current Status of Research Progress |
Current Status of Research Progress
3: Progress in research has been slightly delayed.
Reason
Progress is generally running according to plan, however the implementation of cosmic ray interaction microphysics into numerical codes has been slower than expected. This is because of (1) a need to await new hadronic interaction models based on interpolated functions from new hadronic code outputs to ensure the treatment of secondary lepton production near interaction thresholds is robust (Afrag version 2.02); (2) unexpected additional work required to prepare an existing codebase (in FLASH4) for the additional hadronic interaction functionality required. It has also been decided to implement the relevant physics into another open-source code base (Athena++) to allow for more flexible scientific application and usage, which will require additional time in FY2024.
|
| Strategy for Future Research Activity |
Detailed cosmic ray interaction microphysics models have been developed and are currently being implemented and validated in magnetohydrodynamical codebases. Application of these microphysical treatments of cosmic ray processes to cosmological filaments, galaxy bubbles, compact groups of galaxies and high energy gamma-ray backgrounds will be the main focus for this research programme during FY 2024 as the project moves into its final stages. While some delays have been encountered, sufficient provision for such delays were included in the original plan to ensure the planned research objectives can still be met within the remaining timeline.
|
