Investigation of particle-accelerated region in jets of active galactic nuclei with radio and optical polarimetry

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K14761
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 16010:Astronomy-related
• Research Institution: Hiroshima University
• Principal Investigator: Sasada Mahito 広島大学, 宇宙科学センター, 特任助教 (10725352)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: ジェット / 活動銀河核 / 電波干渉計 / 可視光

Outline of Final Research Achievements

Our purpose was to identify particle-acceleration regions of high-energy electrons in active galactic nuclei jets. We have developed software for imaging of a data of a very long baseline interferometry and applied it to actual data to reconstruct jet images with spatial resolution several times better than that of a conventional method. By reconstructing super-resolved images from the multi-epoch data, we were able to capture the time variation of the jet and identify a presence of a helical magnetic field that constructs the jet from the jet behavior.

Free Research Field

天文学

Academic Significance and Societal Importance of the Research Achievements

本研究では電波干渉計データを画像へ再構成するソフトウェア開発の一端を担っている。開発したソフトウェアは電波干渉計データ一般に適用可能であり、過去に取得されたデータに適用することで、今まで以上の空間分解能の画像を取得することが可能となり、本研究のみならず広く応用が可能な技術となる。