Zobrazeno 1 - 10
of 148
pro vyhledávání: '"Kozasa, takashi"'
Autor:
Yamashita, Maiko, Iwamoto, Shoko, Ochiai, Mariko, Sudo, Kasumi, Nagasaka, Takao, Saito, Akito, Kozasa, Takashi, Omatsu, Tsutomu, Mizutani, Tetsuya, Yamamoto, Kinya
Publikováno v:
In Research in Veterinary Science January 2025 182
Dust formation and resulting mass loss around Asymptotic Giant Branch (AGB) stars with initial metallicity in the range of $0 \leq Z_{\rm ini} \leq 10^{-4}$ and initial mass $2\leq M_{\rm ini}/M_{\odot} \leq 5$ are explored by the hydrodynamical calc
Externí odkaz:
http://arxiv.org/abs/1612.01695
Probing the Physical Conditions of Supernova Ejecta with the Measured Sizes of Presolar Al2O3 Grains
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 formation condition of such large Al2O3 grains, we investigate the condensat
Externí odkaz:
http://arxiv.org/abs/1509.01909
Autor:
Sakon, Itsuki, Sako, Shigeyuki, Onaka, Takashi, Nozawa, Takaya, Kimura, Yuki, Fujiyoshi, Takuya, Shimonishi, Takashi, Usui, Fumihiko, Takahashi, Hidenori, Ohsawa, Ryou, Arai, Akira, Uemura, Makoto, Nagayama, Takahiro, Koo, Bon-Chul, Kozasa, Takashi
We present infrared multi-epoch observations of the dust forming nova V1280 Sco over $\sim$2000 days from the outburst. The temporal evolution of the infrared spectral energy distributions at 1272, 1616 and 1947 days can be explained by the emissions
Externí odkaz:
http://arxiv.org/abs/1507.08801
Autor:
Nozawa, Takaya, Yoon, Sung-Chul, Maeda, Keiichi, Kozasa, Takashi, Nomoto, Ken'ichi, Langer, Norbert
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. We show that, in a carbon-rich wind with a constant velocity, carbon
Externí odkaz:
http://arxiv.org/abs/1404.5391
Autor:
Nozawa, Takaya, Kozasa, Takashi
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 species (key molecule) controls the kinetics of dust formation process. T
Externí odkaz:
http://arxiv.org/abs/1308.1873
Autor:
Isensee, Karl, Olmschenk, Greg, Rudnick, Lawrence, DeLaney, Tracey, Rho, Jeonghee, Smith, J. D., Reach, William T., Kozasa, Takashi, Gomez, Haley
We present a 3-dimensional analysis of the supernova remnant Cassiopeia A using high resolution spectra from the Spitzer Space Telescope. We observe supernova ejecta both immediately before and during the shock-ejecta interaction. We determine that t
Externí odkaz:
http://arxiv.org/abs/1208.4034
The discovery of a low-mass star with such low metallicity as < 4.5x10^{-5} Z_sun reveals the critical role of dust in the formation of extremely metal-poor stars. In this paper we explore the effect of the growth of dust grains through accretion of
Externí odkaz:
http://arxiv.org/abs/1208.0158
Autor:
Yasuda, Yuki, Kozasa, Takashi
We investigate the formation of silicon carbide (SiC) grains in the framework of dust-driven wind around pulsating carbon-rich Asymptotic Giant Branch (C-rich AGB) stars in order to reveal not only the amount but also the size distribution. Two cases
Externí odkaz:
http://arxiv.org/abs/1109.6386
On the effects of microphysical grain properties on the yields of carbonaceous dust from type II SNe
Autor:
Fallest, David W., Nozawa, Takaya, Nomoto, Ken'ichi, Umeda, Hideyuki, Maeda, Keiichi, Kozasa, Takashi, Lazzati, Davide
We study the role of the unknown microphysical properties of carbonaceous dust particles in determining the amount and size distribution of carbonaceous dust condensed in type II supernova explosions. We parametrize the microphysical properties in te
Externí odkaz:
http://arxiv.org/abs/1105.4631