The nitrogen-deficient cluster NGC 6231

Details The nitrogen-deficient cluster NGC 6231 The nitrogen-deficient cluster NGC 6231

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...279l..11k&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 279, April 1, 1984, p. L11-L14. Research supported

Other

19

Abundance, B Stars, Main Sequence Stars, Nitrogen, Star Clusters, Stellar Spectra, Interstellar Matter

Scientific paper

Spectra of five main-sequence B type stars have been obtained for the wavelength range from 3900 to 4020 A at a spectral resolution of 0.2 A with the Anglo-Australian Telescope. Analysis of the absorption-line strengths yields a nitrogen underabundance of 0.5 + or - 0.1 dex with other element abundances being normal. This composition is believed to reflect that of the interstellar medium from which the cluster recently formed, implying that significant galactic abundance variations are present on distance scales of the order of 1 kpc.

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