| Literature DB >> 16592476 |
Abstract
The irregular emission nebula NGC 6302 exhibits a rich spectrum of lines ranging in excitation from [NI] to [FeVII]. An assessment of available spectroscopic data, covering a large intensity range, indicates excess of helium and nitrogen as compared with average planetary nebulae, but deficiencies in iron and calcium. These metals are presumably tied up in solid grains, as suggested by Shields for iron in NGC 7027.Entities:
Year: 1978 PMID： 16592476 PMCID： PMC411169 DOI： 10.1073/pnas.75.1.1
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN： 0027-8424 Impact factor: 11.205