5 papers
Interaction-powered Type Ibn Supernovae as a Transient PeVatron Candidate: The Case of SN 2023uqf
Ryo Sawada, Yusuke Inoue, Yosuke Ashida
We investigate whether the Type Ibn supernova SN 2023uqf, reported close in time and direction to the 442 TeV IceCube alert IC-231004A, is physically consistent with a shock-…
Impacts of hydrogen envelope on supernova fallback and the resulting compact remnant masses
Kengo Shinoda, Yudai Suwa, Ryosuke Hirai +4
Fallback in core-collapse supernovae plays a central role in setting compact-remnant masses and may produce late-time emission. In hydrogen rich progenitors, the reverse shock aris…
Cosmic-Ray Bath in a Past Supernova Gives Birth to Earth-Like Planets
Ryo Sawada, Hiroyuki Kurokawa, Yudai Suwa +3
A key question in astronomy is how ubiquitous Earth-like rocky planets are. The formation of terrestrial planets in our solar system was strongly influenced by the radioactive deca…
Inhomogeneous stellar mixing in the final hours before the Cassiopeia A supernova
Toshiki Sato, Kai Matsunaga, Hiroyuki Uchida +10
Understanding stars and their evolution is a key goal of astronomical research and has long been a focus of human interest. In recent years, theorists have paid much attention to t…
Towards Multi Energy Neutrino Astronomy: Diagnosing Enhanced Circumstellar Material around Stripped-Envelope Supernovae
Ryo Sawada, Yosuke Ashida
A novel approach is proposed to reveal a secret birth of enhanced circumstellar material (CSM) surrounding a collapsing massive star using neutrinos as a unique probe. In this sche…