Author Archives: Hiromasa Suzuki

We held a research camp with Konan-U and OMU (Osaka Metropolitan University) members at a guesthouse in Nara. The place is surrounded by beautiful nature. Big meetings and small workshops have different pros and cons. They both matter.

I gave an overview of XRISM/Xtend on behalf of the Xtend team, at the 1st XRISM Data Analysis Workshop held at the University of Maryland on 2023 Feb. 22–23. This is to maximize the science outcome of XRISM, for which we will be working on hard starting from the latter half of this year.

I remotely gave a presentation at the High Energy Seminar at the Center for Astrophysics | Harvard-Smithsonian. The title was “Gamma-ray and X-ray studies on particle acceleration in supernova remnants: basic trends and a variety”. CfA HEA talks are uploaded to Youtube link. 12:30 PM in Boston is 2:30 AM in Japan…

I have been selected as a winner of the Young Scientist Award of the Physical Society of Japan. The prize is for my studies on particle acceleration physics in supernova remnants through gamma-ray and thermal X-ray observations. Prof. T. Tanaka gave a recommendation for the award. Related links: JPS pdf (English), JPS webpage (Japanese), webpageContinue reading “Young Scientist Award of the Physical Society of Japan”

I have been attending the thermal-vacuum test of the XRISM spacecraft held at the JAXA Tsukuba Space Center, Japan in this August. This is the final chance for us (Xtend team) to check the performance of Xtend, which includes the basic operation, energy resolution, CCD temperature control, etc. The picture is from the XRISM officialContinue reading “Thermal-vacuum test of XRISM spacecraft”

Our recent paper entitled “Particle acceleration controlled by ambient density in the southwestern rim of RCW 86” has been accepted for publication in ApJ (arXiv link). The southwestern region of the supernova remnant RCW 86 is very suitable for studying how acceleration conditions are affected by environmental properties. We have found that the acceleration efficiencyContinue reading “Chandra X-ray study of the RCW 86 southwestern region”

I will give a presentation at the 7th Heidelberg International Symposium on High-Energy Gamma-Ray Astronomy. The presentation is about our systematic study on the particle acceleration in supernova remnants based on Suzuki et al. 2022.

I will give a presentation at the European Astronomical Society Annual Meeting 2022. The presentation is about our recent X-ray study of RCW 86 (ApJ, under review). We investigated the shock velocity, thermal & non-thermal X-ray properties of the southwestern region of RCW 86. Our findings suggest that ambient density controls the particle acceleration conditions:Continue reading “Presentation at EAS 2022”

I gave a presentation about the Chandra ACIS particle-induced background at IACHEC 2022. The “mkacispback” tool is now also available on the XSPEC “more models ” webpage. The detector background of different satellites with different orbits is very interesting.

Our latest work is accepted for publication in ApJ. In this work, we have studied X-ray and gamma-ray properties of supernova remnants to evaluate their maximum attainable energies during lifetime. As most astrophysicists know, there are only a few supernova remnants which are accelerating particles up to PeV energies. We have evaluated this in aContinue reading “Are supernova remnants PeVatrons ?”