3 citations
- Kyoto UniversityJP4 papers
- National Astronomical Observatory of JapanJP4 papers
- The Graduate University for Advanced Studies, SOKENDAIJP3 papers
- Rikkyo UniversityJP2 papers
- The University of TokyoJP2 papers
- University of MiyazakiJP2 papers
- Aoyama Gakuin UniversityJP1 paper
- Astronomical ObservatoryRS1 paper
- Astronomy and SpaceAU1 paper
- Catholic University of AmericaUS1 paper
- Center for Astrophysics Harvard & SmithsonianUS1 paper
- Ehime UniversityJP1 paper
4 papers · 1 filter
Radio Constraints on the Circumstellar Environment of the Type IIb Supernova SN 2024iss
Yuhei Iwata, Tomoki Matsuoka, Masanori Akimoto +6
Type~IIb supernovae exhibit diverse progenitor properties, and radio observations offer a unique probe of their mass-loss histories shortly before the explosion. We present Japanes…
Chandra X-Ray Imaging and Spatially Resolved Spectroscopy of SN 1987A: Energy-Dependent Morphology of the Equatorial Ring
Yusuke Sakai, Shinya Yamada, Koji Mori +8
We present a systematic imaging and spatially resolved spectral study of SN 1987A using Chandra observations obtained between 1999 and 2025. By combining multiepoch ACIS and HETG d…
Discovery of CO Clouds Associated with the X-ray Jets of SS 433: Evidence for Shock-Cloud Interaction Enhancing Nonthermal X-ray Emission
Haruka Sakemi, Hidetoshi Sano, Yasuo Fukui +7
We report the first identification of molecular clumps directly associated with the re-brightening regions of the large-scale X-ray jets of SS 433, based on CO ( = 1--0)…
Spectral and photometric variability of SS 433 observed with XRISM and simultaneous optical and near-infrared telescopes
Yusuke Sakai, Shinya Yamada, Yuta Okada +36
We present results from coordinated multiwavelength observations of the SS 433, obtained with XRISM, optical telescopes, and near-infrared camera during 2024 April and 2025 March.…