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3 results on '"Anders, Edward"'

1. Meteoritic silicon.

Author

Ming, Tang, Anders, Edward, Hoppe, Peter, and Zinner, Ernst

Subjects
*COSMIC grains, *SILICON carbide, *CARBIDES, *METEORITES, *CARBON, *NITROGEN, *ISOTOPES, *STARS, *RED giants
Abstract

Interstellar silicon carbide grains in meteorites provide a novel means for studying the carbon-star population of about 5 x 10 9 years ago. Their 12C/13C ratios differ greatly from the solar value but resemble those of present-day carbon stars, implying little change in galactic 13C inventory. Isotope data on nitrogen and silicon suggest that the silicon carbide grains come mainly from red giants, with small contributions from novae. [ABSTRACT FROM AUTHOR]

Published
1989
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2. Properties, detectability and origin of interstellar diamonds in meteorites.

Author

Lewis, Roy S., Anders, Edward, and Draine, Bruce T.

Subjects
*DIAMONDS, *NATIVE element minerals, *METEORITES, *CONDENSATION, *ATMOSPHERE, *SUPERNOVAE
Abstract

The article discusses the properties, detectability and origin of interstellar diamonds in meteorites. According to the author, laboratory studies suggest that microdiamonds will be quite subtle in interstellar space, being detectable only if >10 percent of the carbon is present as diamond. The diamonds evidently formed by condensation in cool stellar atmosphere, and were then impregnated with isotopically anomalous noble gases from supernova.

Published
1989
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