426 citations · 2.4k across the 37 of their papers we have counts for
13 papers · 1 filter
Alfvén wave-driven wind from RGB and AGB stars
Y. Yasuda, T. K. Suzuki, T. Kozasa
We develop a magnetohydrodynamical model of Alfvén wave-driven wind in open magnetic flux tubes piercing the stellar surface of Red Giant Branch (RGB) and Asymptotic Giant Branch (…
Dust formation and mass loss around intermediate-mass AGB stars with initial metallicity in the early Universe I: Effect of surface opacity on the stellar evolution and dust-driven wind
Shohei Tashibu, Yuki Yasuda, Takashi Kozasa
Dust formation and resulting mass loss around Asymptotic Giant Branch (AGB) stars with initial metallicity in the range of and initial mass $2\leq…
Probing the Physical Conditions of Supernova Ejecta with the Measured Sizes of Presolar Al2O3 Grains
Takaya Nozawa, Shigeru Wakita, Yasuhiro Hasegawa +1
A few particles of presolar Al2O3 grains with sizes above 0.5 mum are believed to have been produced in the ejecta of core-collapse supernovae (SNe). In order to clarify the format…
Dust Production Factories in the Early Universe: Formation of Carbon Grains in Red-supergiant Winds of Very Massive Population III Stars
Takaya Nozawa, Sung-Chul Yoon, Keiichi Maeda +3
We investigate the formation of dust in a stellar wind during the red-supergiant (RSG) phase of a very massive Population III star with the zero-age main sequence mass of 500 M_sun…
Formulation of Non-steady-state Dust Formation Process in Astrophysical Environments
Takaya Nozawa, Takashi Kozasa
The non-steady-state formation of small clusters and the growth of grains accompanied by chemical reactions are formulated under the consideration that the collision of key gas spe…
Properties of Newly Formed Dust Grains in The Luminous Type IIn Supernova 2010jl
K. Maeda, T. Nozawa, D. K. Sahu +15
Supernovae (SNe) have been proposed to be the main production sites of dust grains in the Universe. Our knowledge on their importance to dust production is, however, limited by obs…