Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...208.6102s&link_type=abstract
American Astronomical Society Meeting 208, #61.02; Bulletin of the American Astronomical Society, Vol. 38, p.141
Astronomy and Astrophysics
Astronomy
Scientific paper
Core-collapse supernovae are predicted to be great dust factories even in early galaxies with very low metallicity. With the metallicity of 1/10 the solar value, the Small Magellanic Cloud (SMC) provides an unique laboratory for studying dust formation and destruction in primordial galaxies. In the Spitzer survey of the SMC we detected the young, oxygen-rich supernova remnant (SNR) 1E 0102.2-7219 (E0102). The remnant has a filled morphology at 24 microns, with two prominent filaments which correspond to the reverse-shocked stellar ejecta seen in the X-ray emission. We find a noticeable excess of the infrared emission relative to the X--ray emission primarily in the central region of E0102. This suggests the existence of up to 8x10-4 Msolar of hot dust, at a temperature of 120 K, associated with E0102. Even if all of the hot dust was formed during the explosion of E0102, the estimated mass of dust is at least 100 times lower than what is predicted by some recent theoretical models for dust production in the ejecta of core-collapse supernovae. We discuss possible implications this result may have for the dust production rate and the efficiency of grain distruction in primordial galaxies.
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