Title:	Dust sputtering by reverse shocks in supernova remnants
Authors:	Nath, Biman B. Laskar, Tanmoy Shull, J Michael
Keywords:	ISM: Dust Extinction Galaxies: High-Redshift ISM: Supernova Remnants
Issue Date:	1-Aug-2008
Publisher:	University of Chicago Press for the American Astronomical Society
Citation:	Astrophysical Journal, 2008, Vol.682, p1055
Abstract:	We consider the sputtering of dust grains, believed to be formed in cooling supernovae ejecta, under the influence of reverse shocks. In the regime of self-similar evolution of reverse shocks, we can follow the evolution of ejecta density and temperature analytically as a function of time in different parts of the ejecta, and calculate the sputtering rate of graphite and silicate grains embedded in the ejecta as they encounter the reverse shock. Through analytic (one-dimensional) calculations, we find that a fraction of the dust mass (1%-20% for silicates and graphites) can be sputtered by reverse shocks, the fraction varying with the grain size distribution and the steepness of the density profile of the ejecta mass. It is expected that many more grains will be sputtered in the region between the forward and reverse shocks, so that our analytical results provide a lower limit to the fraction of dust mass destroyed.
Description:	Restricted Access. An open-access version is available at arXiv.org. Articles older than 2 years are open to all at the journal site (alternative location)
URI:	http://hdl.handle.net/2289/3676
ISSN:	P-ISSN : 0004-637X E-ISSN : 1538-4357
Alternative Location:	http://adsabs.harvard.edu/abs/2008ApJ...682.1055N http://arxiv.org/abs/0804.3472 http://dx.doi.org/10.1086/589224
Copyright:	2008: The American Astronomical Society
Appears in Collections:	Research Papers (A&A)

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