Jeremy Lim   Paul K. H. Yeung   Tomoyuki Hanawa   Shigehisa Takakuwa   Tomoaki Matsumoto   Kazuya Saigo   
ASTROPHYSICAL JOURNAL 826(2) 153 2016年8月 [査読有り]
Both bulk rotation and local turbulence have been widely suggested to drive the fragmentation in collapsing cores that produces multiple star systems. Even when the two mechanisms predict different alignments for stellar spins and orbits, subseque...
10TH INTERNATIONAL CONFERENCE ON NUMERICAL MODELING OF SPACE PLASMA FLOWS: ASTRONUM-2015 719 2016年 [査読有り]
Protoplanetary disks are circumstellar disks of gas and dust, from which planets may eventually form or be in the process of forming. Recent direct imaging of them has enabled us to derive the density and temperature distributions. Interestingly t...
10TH INTERNATIONAL CONFERENCE ON NUMERICAL MODELING OF SPACE PLASMA FLOWS: ASTRONUM-2015 719 2016年 [査読有り]
We examine the two-fluid cosmic-ray magnetohydrodynamic (CR MHD) equations to take account of the dynamical effects of cosmic rays (CRs) in the simplest form. For simplicity we assume that the pressure of the CRs is proportional to the energy dens...
Proceedings of the International Astronomical Union 14(A30) 105-105 2020年3月
<title>Abstract</title>Filamentary molecular clouds are thought to fragment to form clumps and cores. However, the fragmentation may be suppressed by magnetic force if the magnetic fields run perpendicularly to the cloud axis. We evaluate the effe...
ASTROPHYSICS OF PLANETARY SYSTEMS: FORMATION, STRUCTURE, AND DYNAMICAL EVOLUTION vol.282(276) 506-+ 2011年
Studies of the structure and evolution of protoplanetary disks are important for understanding star and planet formation. Here, we present the direct image of an interacting binary protoplanetary system. Both circumprimary and circumsecondary disk...
Masahiro N. Machida   Tomoaki Matsumoto   Tomoyuki Hanawa   Kohji Tomisaka   
ASTROPHYSICAL JOURNAL 645(2) 1227-1245 2006年7月
We studied the collapse of rotating molecular cloud cores with inclined magnetic fields, based on three-dimensional numerical simulations. The numerical simulations start from a rotating Bonnor-Ebert isothermal cloud in a uniform magnetic field. T...
International Astronomical Union. Asian-Pacific Regional Meeting, 池内, 了, Hearnshaw, J. B., 花輪, 知幸, International Astronomical Union, Astronomical Society of the Pacific, Nihon Tenmon Gakkai
Astronomical Society of the Pacific 2003年 (ISBN:1583811346)