Neutral Carbon in the Protoplanetary Nebulae CRL 618 and CRL 2688
Copyright policy ) Young, K.;
Neutral Carbon in the Protoplanetary Nebulae CRL 618 and CRL 2688
The 609u 3P1 -> 3P0 line of neutral atomic carbon has been detected in the protoplanetary nebulae CRL 618 and CRL 2688. CI appears to be about 7% as abundant as CO in CRL 2688, and 70% as abundant as CO in CRL 618. CI emission arises primarily from the slow component of the wind from these objects. The data presented here indicate that CI gradually becomes more abundant as the star leaves the AGB, and CI is significantly enhanced relative to CO before the star develops a large HII region.
7 pages, LaTex AASTeX macros. To appear in ApJ Letters
- Harvard-Smithsonian Center for Astrophysics United States
- Smithsonian Astrophysical Observatory United States
Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics
Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics
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selected citations
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These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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