Massive first star binaries as new tools for Galactic archaeology

Takuma Suda*, Takayuki R. Saitoh, Yuki Moritani, Tadafumi Matsuno, Toshikazu Shigeyama

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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Abstract

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.
Original languageEnglish
Title of host publicationThe 16th International Symposium on Nuclei in the Cosmos
PublisherEPJ Web of Conferences
Number of pages3
DOIs
Publication statusPublished - 1-Sept-2022
EventThe 16th International Symposium on Nuclei in the Cosmos (NIC-XVI) - Beijing Normal University and the China Institute of Atomic Energy (CIAE), Chengdu, China
Duration: 21-Sept-202125-Sept-2021

Publication series

NameEPJ Web of Conferences
Publisher EDP Sciences
Volume260
ISSN (Print)2100-014X

Conference

ConferenceThe 16th International Symposium on Nuclei in the Cosmos (NIC-XVI)
Country/TerritoryChina
City Chengdu
Period21/09/202125/09/2021

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