On the violet flux of N type carbon stars

Details On the violet flux of N type carbon stars On the violet flux of N type carbon stars

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...324..490f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 324, Jan. 1, 1988, p. 490-500.

Astronomy and Astrophysics

Astrophysics

5

Carbon Stars, Stellar Composition, Stellar Spectrophotometry, Visual Photometry, Carbon Isotopes, Infrared Photometry, Iue, Opacity, Silicon Carbides

Scientific paper

New six-color violet photometry of 26 carbon stars is presented. These observations reveal the shape of the spectrum between 3400 and 4500 A and provide a measurement of the violet flux deficiency. The strength of the 11.5-micron SiC emission feature was also measured using ground-based infrared spectrophotometry and the IRAS low-resolution spectral catalog. The lack of correlation between the 11.5-micron emission and the violet flux deficiency leads to the conclusion that SiC is not the predominant violet opacity source in N type carbon stars. The violet photometry presented here does not quantitatively agree with previous spectrophotometry that supported C3 as the opacity source. The observations alone do not rule out the C3 opacity, but when they are combined with IUE data, the C3 opacity appears less plausible.

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