協辦單位
NMNS
協辦單位
ASIAA
贊助單位
MOST
會徽Logo
名稱Title
2019天文年會
國立自然科學博物館
5月17日至19日

論文摘要

Early Impacts of the First Stars

[ Oral ]

Chao, Tzu-Hsiang(Department of Physics, National Taiwan University, Taipei, Taiwan/ Institute of Astronomy and Astrophysics, Academia Sinica, Taipei, Taiwan); Sung-Han Tsai(Institute of Astronomy and Astrophysics, Academia Sinica, Taipei, Taiwan; Department of Physics, National Central University, Taoyuan, Taiwan);Ke-Jung Chen(Institute of Astronomy and Astrophysics, Academia Sinica, Taipei, Taiwan)

We use the three-dimensional smoothed particle hydrodynamics code GADGET-2, with detailed cooling and chemistry of primordial gas, and a radiative transfer scheme of ray-tracing, to study the realistic radiative feedback of first stars to the surrounding primordial gas. Based on previous work, together with detailed stellar evolution models by the MESA code provided, time-dependent properties of first single and binary stars are captured and implemented in simulations. The simulations start from a minihalo (z ≃ 28) with the mass resolution about a few solar masses to the end of the lifetime in each stellar system. We present some preliminary results including single and binary stars with/without interaction and binary cases with a disk. Also, we discuss essential feedbacks of first stars and possibilities of future works, such as gamma-ray bursts, X-ray binaries, and supernovae, extending to the formation of the 2nd generation of stars and first galaxies.