Characterizing the physical properties of dust grains in a protoplanetary disk is critical to comprehending the planet formation process. Our study presents Atacama Large Millimeter/submillimeter Array (ALMA) high-resolution observation...
We present a numerical method for solving the Poisson equation on a nested grid. A nested grid consists of uniform grids having different grid spacing and is designed to cover the space closer to the center with a finer grid. Thus, our numerical m...
K Saigo   T Hanawa   T Matsumoto   
ASTROPHYSICAL JOURNAL 581(1) 681-693 2002年12月
We present three-dimensional numerical simulations for the formation and evolution of an accreting protoplanetary disk. The disk was assumed to be formed by the gravitational collapse of a rotating gas cloud. It was assumed to be nearly axisymmetr...
T Hanawa   K Saigo   T Matsumoto   
ASTROPHYSICAL JOURNAL 558(2) 753-760 2001年9月
We investigate the growth of the bar mode during the main accretion phase of protostar formation. Our stability analysis shows that the bar mode grows both in the pre-protostellar phase, and in the main accretion phase. The perturbation has a larg...
We developed a numerical simulation code using a nested grid method. The code allows us to follow a collapse and fragmentation of molecular cloud cores with a fine resolution. Our simulations show that a molecular cloud core, of which size is 0.1 ...
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)