Abstract
Dust grains in low density gas are subjected to sputtering and shattering in fast supernovae shocks. Although there has been extensive modelling of the dust destruction, still little is known about the grains which survive. Jones et al. (1996) have modeled the effect of the destruction processes on the size distribution of grains. They predict that fast J shocks are efficient in grinding large dust grains into smaller particles. We present observations of the dust emission around the nearby star Spica. Comparison of the observations to the infrared emission of ‘standard’ cirrus suggest that the abundance of very small grains is significantly enhanced.
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© 1998 Springer-Verlag
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Zagury, F., Jones, A., Boulanger, F. (1998). Dust composition in the low density medium around spica. In: Breitschwerdt, D., Freyberg, M., Trümper, J. (eds) The Local Bubble and Beyond Lyman-Spitzer-Colloquium. Lecture Notes in Physics, vol 506. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0104751
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DOI: https://doi.org/10.1007/BFb0104751
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