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Dust in Supernovae; Formation and Evolution

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Title: Dust in Supernovae; Formation and Evolution
Authors: Kozasa, Takashi Browse this author
Nozawa, Takaya Browse this author
Tominaga, Nozomu Browse this author
Umeda, Hideyuki Browse this author
Maeda, Keiichi Browse this author
Nomoto, Ken'ichi Browse this author
Issue Date: Mar-2010
Publisher: Astronomical Society of the Pacific
Citation: Cosmic Dust - Near and Far. Eds. by Thomas Henning, Eberhard Grün, and Jürgen Steinacker. ISBN: 978-1-58381-708-7
Journal Title: Astronomical Society of the Pacific conference series
Volume: 414
Start Page: 43
Abstract: Core-collapsed supernovae (CCSNe) have been considered to be one of sources of dust in the universe. What kind and how much mass of dust are formed in the ejecta and are injected into the interstellar medium (ISM) depend on the type of CCSNe, through the difference in the thickness (mass) of outer envelope. In this review, after summarizing the existing results of observations on dust formation in CCSNe, we investigate formation of dust in the ejecta and its evolution in the supernova remnants (SNRs) of Type II–P and Type IIb SNe. Then, the time evolution of thermal emission from dust in the SNR of Type IIb SN is demonstrated and compared with the observation of Cas A. We find that the total dust mass formed in the ejecta does not so much depend on the type; ∼0.3–0.7 Msun in Type II–P SNe and ∼0.13 Msun in Type IIb SN. However the size of dust sensitively depends on the type, being affected by the difference in the gas density in the ejecta: the dust mass is dominated by grains with radii larger than 0.03 μm in Type II-P, and less than 0.006 μm in Type IIb, which decides the fate of dust in the SNR. The surviving dust mass is ∼0.04&emdash;0.2 Msun in the SNRs of Type II–P SNe for the ambient hydrogen density of nH=10.0–1.0 cm-3 while almost all dust grains are destroyed in the SNR of Type IIb. The spectral energy distribution (SED) of thermal emission from dust in SNR well reflects the evolution of dust grains in SNR through erosion by sputtering and stochastic heating. The observed SED of Cas A SNR is reasonably reproduced by the model of dust formation and evolution for Type IIb SN.
Description: Cosmic Dust - Near and Far. 8-12 September 2008. Convention Center, Heidelberg, Germany.
Conference Name: Cosmic Dust : Near and Far
Conference Place: Heidelberg
Type: proceedings (author version)
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 小笹 隆司

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