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Origin and Nature of Dust in the Early Universe

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Title: Origin and Nature of Dust in the Early Universe
Authors: Nozawa, T. Browse this author
Kozasa, T. Browse this author
Umeda, H. Browse this author
Hirashita, H. Browse this author
Maeda, K. Browse this author
Nomoto, K. Browse this author
Tominaga, N. Browse this author
Habe, A. Browse this author
Dwek, E. Browse this author
Takeuchi, T. T. Browse this author
Ishii, T. T. 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: 247
Abstract: We present recent advances in theoretical studies of the formation and evolution of dust in primordial supernovae (SNe) that are considered to be the main sources of dust in the early universe. Being combined with the results of calculations of dust formation in the ejecta of Population III SNe, the investigations of the evolution of newly formed dust within supernova remnants (SNRs) show that smaller grains are predominantly destroyed by sputtering in the shocked gas, while larger grains are injected into the ambient medium. The mass of dust grains surviving the destruction in SNRs reaches up to 0.1–15 Msun, which is high enough to account for the content of dust observed for the host galaxies of quasars at z > 5. In addition, the transport of dust formed in the ejecta causes the formation of low-mass stars in the dense shell of primordial SNRs and affects the elemental composition of those stars. We also show that the flat extinction curve is expected in the high-redshift universe where SNe are the possible sources of dust.
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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