CASUS Institute Seminar, Dr. Shota Shibagaki, Scultetus Visiting Scientist, University of Wrocław, Poland
Abstract of the talk// Gravitational waves and neutrinos are considered as unique direct probes of the central engine for core-collapse supernovae. Massive stars end their lives with the gravitationally induced collapse of their central core, resulting in either a luminous explosion as a core-collapse supernovae or failure of a stellar explosion with weak or no electromagnetic signals. During this astrophysical phenomenon, a hot neutron star, known as protoneutron star, is formed at the center of the star and emits gravitational waves and neutrinos, which carry information of dynamics and thermodynamic properties of the protoneutron star. In this talk, Shota gives first an overview of several proposed scenarios for core-collapse supernovae and observables expected from such events. He next shows his recent results of the time-frequency analysis of the gravitational wave and neutrino signals obtained from his multidimensional general relativistic radiation hydrodynamics simulations of stellar core collapse, and discusses the detectability of their characteristic features.
CV// Dr. Shota Shibagaki is a postdoctoral researcher at the Incubator of Scientific Excellence—Centre for Simulations of Superdense Fluids of the University of Wrocław. He is also a Scultetus Visiting Scientist at CASUS. He received his Ph.D. in Astronomy at The University of Tokyo, Japan in 2017. From 2017 to 2018 he was a JSPS Research Fellow at the National Astronomical Observatory of Japan. From 2018 to 2021, he served as a KAKENHI Fellow at Fukuoka University, Japan. From 2021, he worked as an Adiunkt (Assistant Professor) in the Division of Elementary Particle Theory at the Institute of Theoretical Physics, University of Wrocław, Poland. Since February 2024, he has been in his current position.
Shota will be talking live in Görlitz. However, as the event is organized in a hybrid format that includes a videoconferencing tool by Zoom Inc., people interested in the topic have the chance to also join the talk remotely. Please ask for the login details via contact@casus.science.