The graphite rich Cepheus OB 3 association

Details The graphite rich Cepheus OB 3 association The graphite rich Cepheus OB 3 association

Jul 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...111..130b&link_type=abstract

Astronomy and Astrophysics, vol. 111, no. 1, July 1982, p. 130-135.

Astronomy and Astrophysics

Astronomy

6

B Stars, Graphite, Interstellar Extinction, Iue, O Stars, Stellar Spectra, Early Stars, Interstellar Space, Particle Size Distribution, Spaceborne Astronomy

Scientific paper

The four optically brightest stars of the Cepheus OB 3 association have been observed with the IUE satellite in the spectral range 1150-3200 A. The extinction suffered by the stars has been investigated. Both the shape of the bump at approximately 2200 A and the behavior of the extinction at longer wavelengths are close to those of the mean interstellar curve. The behavior shortward of 2000 A is peculiar and reveals the existence of a component of dust which belongs to the association. A fit with theoretical extinction curves shows that a strong excess of graphite relative to silicates in the local component is required to explain the observed extinction in the Cepheus OB 3 association.

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