Fitting the unusual UV extinction curve of V348 SGR

Details Fitting the unusual UV extinction curve of V348 SGR Fitting the unusual UV extinction curve of V348 SGR

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...339l..61w&link_type=abstract

Astronomy and Astrophysics, v.339, p.L61-L64 (1998)

Astronomy and Astrophysics

Astrophysics

5

Stars, Rcb Stars-Carbon: Laboratory, Dust, Extinction

Scientific paper

We have produced new types of carbonaceous condensates from the ejecta of a hydrocarbon plasma. These condensates are named Quenched Carbonaceous Composites (QCC). There are various types of QCC formed around the center of the ejecta that show an absorption feature in the spectral range 220-250 nm. The QCC with an absorption feature at 220 nm is composed of onion-like spherules; that with an absorption feature at 230-240 nm are composed of polyhedral particles; and that with an absorption feature at 250 nm is composed of ribbons with bent graphitic layers. The 240-250 nm absorption feature of the hot evolved star V348 Sgr can be matched by the ribbon-like QCC, suggesting that this type of QCC may be present in the circumstellar shell of this star.

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