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Cold dust in Supernovae - the origin of dust in high redshift galaxies

Morgan, H. L., Dunn, L., Eales, Stephen Anthony, Edmunds, Michael Geoffrey and Ivison, R. 2004. Cold dust in Supernovae - the origin of dust in high redshift galaxies. Presented at: Astrophysics of Dust 2003, Estes Park , CO, USA, 26 - 30 May 2003.

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The role of dust at present and at earlier epochs is highly controversial. Recent SCUBA surveys have discovered a population of extremely dusty objects at high redshifts, implying that a significant amount of dust is present at redshifts > 5. However, remarkably little is known about the origin of high redshift dust, particularly whether or not it is formed in supernovae (SNe). It is generally accepted that the majority of dust is formed in the atmopsheres of giant stars, yet it is difficult to produce the large quantities of dust observed at high redshifts as the time-scales are too short for the intermediate mass stars to reach their dust producing phases. We investigate the sources and amount of dust in early galaxies using simple chemical evolution models and conclude that Type II SNe must be important as dust formation sites to explain the observations. If dust does not condense efficiently in SNe then significant dust masses can only be generated at z > 5 by galaxies with extremely high rates of star formation. We present new Submm observations of the Kepler supernova remnant.

Item Type: Conference or Workshop Item (Paper)
Date Type: Completion
Status: Unpublished
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
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Last Modified: 04 Jun 2017 05:05

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