Testing for Products of Oxygen Burning in the Crab Nebula

Details Testing for Products of Oxygen Burning in the Crab Nebula Testing for Products of Oxygen Burning in the Crab Nebula

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...188.7501s&link_type=abstract

American Astronomical Society, 188th AAS Meeting, #75.01; Bulletin of the American Astronomical Society, Vol. 28, p.950

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It has recently been suggested (MacAlpine et al. 1996, ApJ, 463) that the Crab Nebula contains a large amount of asymmetrically distributed gas which is significantly enriched with products of oxygen burning (e.g., silicon, sulfur and argon). If this is correct, then those filaments with unusually strong [S II] lambda lambda 6716, 6731 emission should also exhibit enhanced [Ar III] lambda 7136 lines. In addition, infrared fine-structure lines like [Si II] 34.8 \micron\ could be expected to lower the gas temperature, below that of other filaments. Using long-slit spectroscopy obtained in December, 1995 at the 2.4m Hiltner telescope of the Michigan-Dartmouth-MIT Observatory, we have derived new measurements which appear to support the above inferences.

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