Welcome

We explore physics behind hot, energetic phenomena in the universe through a wide variety of telescopes including space-based X-ray observatories. Our research particularly focuses on high energy physical processes associated with supernova remnants, neutron stars, and black holes. We also develop new observational instruments for future satellite missions.

私たちは、宇宙X線観測衛星をはじめとする様々な望遠鏡の観測データを用いて、熱く激しい天体現象に潜む物理を突き止めようとしています。特に超新星残骸や中性子星・ブラックホールにおける高エネルギー物理過程を精力的に研究しています。また、将来の衛星搭載を目指して新しい観測機器の開発も進めています。

News

Paper

The paper by Dr. Aya Bamba has been accepted for PASJ.

The paper ‘Measuring the asymmetric expansion of the Fe ejecta of Cassiopeia A with XRISM/Resolve’, by Dr. Bamba, has been accepted for publication in the special XRISM issue of the journal PASJ. In this paper, we observed the supernova remnant Cassiopeia A (Cas A), which is about 350 years old, with XRISM, which has excellent energy resolution, We showed that the plasma containing iron elements shows red-shift in the north-east and blue-shift in the south-west. From these observational facts we have identified that in Cas A fragments of the pre-explosion star are scattered in non-isotropic directions. These results are consistent …

Paper

The paper by Dr. Dai Tateishi has been accepted for PASJ.

The paper titled “Study of the Origin of the Azimuthal Variation of Synchrotron X-ray Spectrum from SNR RX J0852.0-4622,” authored by Dr. Dai Tateishi from the Bamba lab, has been accepted for PASJ. In this study, the authors compared the spatial distribution of the X-ray spectrum of SNR RX J0852.0-4622 with the distribution of molecular cloud density and shock velocity. The results indicate a positive correlation between molecular cloud density and X-ray flux throughout the SNR. Additionally, a positive correlation was found between X-ray flux and shock velocity in the southern region of the SNR. Based on these findings, the …

Award

Two Bamba Lab. students received the Best Poster Award at the International Research Meeting.

Two Bamba Lab students, Toshiya Iwata (D2) and Riki Sato (M1), received the Best Poster Award at the international workshop “XRISM Science Workshop for Young Researchers 2024” held at Tokyo Metropolitan University. Congratulations! Best Poster AwardToshiya Iwata 　”Probing relativistic effects in black hole accretion with high-resolution spectroscopy and polarimetry”Poster AwardRiki Sato 　”Revealing the structure of AGN outflows through a time-variability study”

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