TY - GEN
T1 - Massive first star binaries as new tools for Galactic archaeology
AU - Suda, Takuma
AU - Saitoh, Takayuki R.
AU - Moritani, Yuki
AU - Matsuno, Tadafumi
AU - Shigeyama, Toshikazu
PY - 2022/9/1
Y1 - 2022/9/1
N2 - Binary systems are important probes of the origin of stars with peculiar chemical features through the interactions between two stars. We have studied the evolution of a metal-free massive binary after the collision of the supernova ejecta with a low-mass companion. Theoretical models are developed using simulations of binaries after core-collapse supernovae using stellar evolution models, supernova ejecta models, and hydrodynamic simulations of the system consisting of supernova ejecta and companion stars. We find that these first star survivors will be observed as metal-rich halo stars in our Galaxy. In combination with the theoretical research, we looked for observational counterparts in the Galactic halo using the observational database where elemental abundances and kinematic data are available. We have also searched for the progenitor binary systems based on radial velocity monitoring. We report the current status of the search for massive binaries in the solar vicinity. The proposed scenario demands a new channel of star formation in the early universe and is a supplementary scenario for the origin of the known metal-poor stars.
AB - Binary systems are important probes of the origin of stars with peculiar chemical features through the interactions between two stars. We have studied the evolution of a metal-free massive binary after the collision of the supernova ejecta with a low-mass companion. Theoretical models are developed using simulations of binaries after core-collapse supernovae using stellar evolution models, supernova ejecta models, and hydrodynamic simulations of the system consisting of supernova ejecta and companion stars. We find that these first star survivors will be observed as metal-rich halo stars in our Galaxy. In combination with the theoretical research, we looked for observational counterparts in the Galactic halo using the observational database where elemental abundances and kinematic data are available. We have also searched for the progenitor binary systems based on radial velocity monitoring. We report the current status of the search for massive binaries in the solar vicinity. The proposed scenario demands a new channel of star formation in the early universe and is a supplementary scenario for the origin of the known metal-poor stars.
U2 - 10.1051/epjconf/202226011042
DO - 10.1051/epjconf/202226011042
M3 - Conference contribution
T3 - EPJ Web of Conferences
BT - The 16th International Symposium on Nuclei in the Cosmos
PB - EPJ Web of Conferences
T2 - The 16th International Symposium on Nuclei in the Cosmos (NIC-XVI)
Y2 - 21 September 2021 through 25 September 2021
ER -