The Crab Nebula's Composition and Precursor Star Mass

Abstract

We present results of new photoionization calculations for investigating gaseous regions that represent potentially expected stages of nuclear processing in the Crab Nebula supernova remnant. In addition to gas resulting from CNO-processing and oxygen-burning, as previously reported, a large component of the nebula appears to be carbon-rich. These results suggest that the precursor star had an initial mass of 9.5 solar masses or more.

manuscript in AASTeX, 6 figures in .eps, submitted to Astronomical Journal

References in corpus (2)

• Nuclear Reactions Important in Alpha-Rich Freezeouts
• A Spectroscopic Study of Nuclear Processing and Production of Anomalously Strong Lines in the Crab Nebula

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