Ethan A.-N. Deneault 2009 ApJ 705 1215 doi:10.1088/0004-637X/705/2/1215
Ethan A.-N. Deneault
Show affiliationsWe present a model for the formation of silicon carbide aggregates within the expanding and cooling supernova remnant. SiC type-X (SiC-X) grains measured in the laboratory at a high spatial resolution have been found to be aggregates of smaller crystals which are isotopically homogenous. The initial condensation of SiC in the ejecta occurs within an interior dense shell of material which is created by a reverse shock which rebounds from the core-envelope interface. A subsequent reverse shock accelerates the grains forward, but the gas drag from the ejecta on the rapidly moving particles limits their travel distance. By observing the effects of gas drag on the travel distance of grains, we propose that supernova grain aggregates form from material that condensed in a highly localized region, which satisfies the observational evidence of isotopic homogeneity in SiC-X grains.
Issue 2 (2009 November 10)
Received 2009 May 7, accepted for publication 2009 August 13
Published 2009 October 20
Ethan A.-N. Deneault 2009 ApJ 705 1215
N. L. Tsintsadze and L. N. Tsintsadze 2009 EPL 88 35001
Richard M. Plotkin et al. 2008 The Astronomical Journal 135 2453
Charles-Etienne Bisaillon et al 2008 Phys. Med. Biol. 53 N237
G. V. Dedkov and A. A. Kyasov 2007 EPL 78 44005
D. Hollenbach et al. 2005 ApJ 631 1180
Gregory W. Henry and Francis C. Fekel 2005 The Astronomical Journal 129 2026
Robert L McMasters et al 2008 Bioinspir. Biomim. 3 016002
Z X Chen et al 2009 Biomed. Mater. 4 065003
Nancy Remage Evans et al. 2008 The Astronomical Journal 136 1137