Search Results - "Umebayashi, Toyoharu"

Effects of Radionuclides on the Ionization State of Protoplanetary Disks and Dense Cloud Cores by Umebayashi, Toyoharu, Nakano, Takenori

“…We comprehensively reinvestigate the ionization rates by radionuclides with the newest data on the abundance of the nuclides for the primitive solar nebula…”
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Mechanism of Magnetic Flux Loss in Molecular Clouds by Nakano, Takenori, Nishi, Ryoichi, Umebayashi, Toyoharu

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Status of the AMS system at Yamagata University by Moriya, Toru, Takeyama, Mirei, Sakurai, Hirohisa, Umebayashi, Toyoharu, Toyoguchi, Teiko, Shiraishi, Tadashi, Miyahara, Hiroko, Ohyama, Motonari, Nozawa, Kohei, Ito, Satoshi, Itoh, Shigeru, Hirota, Masashi, Tokanai, Fuyuki

“…An accelerator mass spectrometry (AMS) system and an automated graphitization line were installed at Yamagata University (YU) in 2009. Approximately 2000…”
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Magnetorotational Instability in Protoplanetary Disks. II. Ionization State and Unstable Regions by Sano, Takayoshi, Miyama, Shoken M, Umebayashi, Toyoharu, Nakano, Takenori

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Evolution of Molecular Abundance in Protoplanetary Disks by Aikawa, Yuri, Umebayashi, Toyoharu, Nakano, Takenori, Miyama, Shoken M

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Evolution of Molecular Abundance in Gaseous Disks around Young Stars: Depletion of CO Molecules by Aikawa, Yuri, Miyama, Shoken M., Nakano, Takenori, Umebayashi, Toyoharu

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EFFECTS OF DUST GROWTH AND SETTLING ON THE IONIZATION BY RADIONUCLIDES. I. FORMULATION AND RESULTS IN A QUIESCENT STATE OF PROTOPLANETARY DISKS by Umebayashi, Toyoharu, Katsuma, Norihito, Nomura, Hideko

“…We investigate the evolution of the ionization rates by the decay of radionuclides in protoplanetary disks at the early stage of planet formation where size…”
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Evolution of Molecular Abundances in Proto-planetary Disks with Accretion Flow by Aikawa, Yuri, Umebayashi, Toyoharu, Nakano, Takenori, Miyama, Shoken M

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Magnetic flux loss from interstellar clouds by Umebayashi, Toyoharu, Nakano, Takenori

“…The densities of charged particles in ionization–recombination equilibrium are investigated with some revised reaction rate coefficients. Especially the…”
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Evolution of Molecular Abundances in Protoplanetary Disks with Accretion Flow by Aikawa, Yuri, Umebayashi, Toyoharu, Nakano, Takenori, Miyama, Shoken M.

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Dissipation of magnetic fields in very dense interstellar clouds – I. Formulation and conditions for efficient dissipation by Nakano, Takenori, Umebayashi, Toyoharu

“…The drift velocity VB of magnetic fields relative to the fluid is obtained by solving the motions of many kinds of charged particles. Any closed curve moving…”
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Mechanism of Magnetic Flux Loss in Molecular Clouds by Nakano, Takenori, Nishi, Ryoichi, Umebayashi, Toyoharu

“…We investigate the detailed processes working in the drift of magnetic fields in molecular clouds. To the frictional force, whereby the magnetic force is…”
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Dissipation of magnetic fields in very dense interstellar clouds – II. Final phases of star formation and the magnetic flux of a newborn star by Nakano, Takenori, Umebayashi, Toyoharu

“…The behaviour of magnetic fields is investigated in the final phases of star formation. In a cloud contracting isothermally before a quasi-hydrostatic core…”
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Magnetorotational Instability in Protoplanetary Disks. II. Ionization State and Unstable Regions by Sano, Takayoshi, Miyama, Shoken M, Umebayashi, Toyoharu, Nakano, Takenori

“…We investigate where in protoplanetary disks magnetorotational instability operates, which can cause angular momentum transport in the disks. We investigate…”
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