nanten2.jpgNANTEN2 mm/sub-mm Radio Telescope alma.jpgAtacama Large Millimeter/ submillimeter Array (ALMA) nro45m.jpgNobeyama 45-m Radio Telescope aste.jpgAtacama Submillimeter Telescope Experiment (ASTE) cta.jpgCherenkov Telescope Array (CTA)credit: DESY/Milde Science Comm./Exozet


August 23th, 2021

Press Release: Where the Milky Way's cosmic rays come from

We made a press release about our recent paper, entitled "Pursuing the Origin of the Gamma Rays in RX J1713.7-3946 Quantifying the Hadronic and Leptonic Components", which was published in The Astrophysical Journal.

August 7th, 2021

Paper Acceptance: Discovery of a Wind-Blown Bubble Associated with the Supernova Remnant G346.6-0.2

My first authored paper, entitled "Discovery of a Wind-Blown Bubble Associated with the Supernova Remnant G346.6-0.2: A Hint for the Origin of Recombining Plasma" was accepted for publication in The Astrophysical Journal.

June 21th, 2021

Paper Acceptance: ALMA CO Observations of Supernova Remnant W49B

My first authored paper, entitled "ALMA CO Observations of the Mixed-Morphology Supernova Remnant W49B: Efficient Production of Recombining Plasma and Hadronic Gamma-rays via Shock-Cloud Interactions" was accepted for publication in The Astrophysical Journal.


Research Interest

Multi-wavelength analysis of supernova remnants

 Recently, an analysis that combines two or more wavelength data (multi-wavelength analysis) has received much attention as an approach to understanding complicated astronomical phenomena. This is an attempt to reveal an astronomical object from various aspects because different physical processes can be studied at different wavelengths. For instance, the radio emission line at 2.6 mm wavelength can trace molecular hydrogen clouds (-263 K), whereas X-rays can reveal plasma at ten million K and/or synchrotron radiation from relativistic electrons.
 Supernova remnants (*1) are suitable targets for the multi-wavelength analysis because they are bright in almost all wavelengths (Fig.1). I am promoting studies that reveal the origin of cosmic-rays (100 years problem in modern astrophysics) by multiwavelength analysis.

*1: A diffuse nebula originated by a supernova explosion in which certain stars end their lives. Supernova remnants have a profound influence on the interstellar space via shock waves, cosmic-ray acceleration, and injection of heavy elements.

Fig.1: Multi-wavelength views of the supernova remnant RCW 86.