Theoretical Models of Protostellar Binary and Multiple Systems with AMR Simulations

11th International Conference on Numerical Modeling of Space Plasma Flows

Matsumoto, Tomoaki^1 ; Tokuda, Kazuki^2 ; Onishi, Toshikazu^2 ; Inutsuka, Shu-Ichiro^3 ; Saigo, Kazuya^2 ; Takakuwa, Shigehisa^4

Faculty of Sustainability Studies, Hosei University, Fujimi, Chiyoda-ku, Tokyo

102-8160, Japan^1

Department of Physical Science, Graduate School of Science, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Osaka, Sakai

599-8531, Japan^2

Department of Physics, Nagoya University, Chikusa-ku, Nagoya

464-8602, Japan^3

Department of Physics and Astronomy, Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima

890-0065, Japan^4

关键词: Adaptive mesh refinement codes;    Dynamical interactions;    Gravitational collapse;    High spatial resolution;    High-resolution numerical simulation;    Molecular clouds;    Multiple systems;    Prominent structures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/837/1/012009/pdf
DOI  :  10.1088/1742-6596/837/1/012009

来源: IOP

【 摘 要 】

We present theoretical models for protostellar binary and multiple systems based on the high-resolution numerical simulation with an adaptive mesh refinement (AMR) code, SFUMATO. The recent ALMA observations have revealed early phases of the binary and multiple star formation with high spatial resolutions. These observations should be compared with theoretical models with high spatial resolutions. We present two theoretical models for (1) a high density molecular cloud core, MC27/L1521F, and (2) a protobinary system, L1551 NE. For the model for MC27, we performed numerical simulations for gravitational collapse of a turbulent cloud core. The cloud core exhibits fragmentation during the collapse, and dynamical interaction between the fragments produces an arc-like structure, which is one of the prominent structures observed by ALMA. For the model for L1551 NE, we performed numerical simulations of gas accretion onto protobinary. The simulations exhibit asymmetry of a circumbinary disk. Such asymmetry has been also observed by ALMA in the circumbinary disk of L1551 NE.