Dust destruction by the reverse shock in the Cassiopeia A supernova remnant

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Table 4

Percentage of dust mass, M_residual/M_init, surviving the passage of the reverse shock in Cas A, evaluated in two different stages of supernova evolution identified by the corresponding values of α.


T ^a	α = 0.33 ^b		α = 0 ^c		BS07^d
(K)	Am C	MgSiO₃	Am C	MgSiO₃	C+Fe₃O₄


~10⁷	16.9%	13.4%	15.9%	11.8%	~7.5%
~10⁸	13.3%	10.4%	12.3%	8.7%	~7.5%

Notes. The result from Bianchi & Schneider (2007) is reported for comparison.

^(a)

Temperature of the smooth ejecta.

^(b)

Corresponding to 2004 (333 yr after explosion).

^(c)

After the reverse shock has reached the centre of the remnant (~8000 yr after explosion).

^(d)

Derived from Bianchi & Schneider (2007): gas temperature between 10⁷ and 10⁸ K; surviving mass calculated after the reverse shock has hit the centre of the remnant.

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