Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004head....8.2422w&link_type=abstract
American Astronomical Society, HEAD meeting #8, #24.22; Bulletin of the American Astronomical Society, Vol. 36, p.952
Astronomy and Astrophysics
Astronomy
Scientific paper
New optical images of the young supernova remnant (SNR) G292.0+1.8, obtained from the 0.9-m telescope at CTIO, show a far more extensive network of filaments than previous data suggest. Images in [O III] show filaments distributed throughout much of the 8 arcmin diameter shell seen in X-ray and radio images. Most of the outer filaments have a radial, pencil-like morphology that is very suggestive of Rayleigh-Tayor fingers. Simulations of core-collapse supernovae predict the development of such fingers, but they have never before been so clearly observed in a young SNR. In addition to the extensive [O III] filaments, we have detected three small complexes of filaments that show [S II] emission along with the oxygen lines. None of the filaments, with or without [S II], show any evidence for hydrogen, so all must be composed of pure supernova ejecta. The [S II] filaments provide the first evidence for products of oxygen burning in the ejecta from the event that gave rise to G292.0+1.8.
This research has been funded primarily by the National Science Foundation through grant AST-0307613.
Long Knox S.
Winkler Frank P.
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