Diferencies ente revisiones de «Estrella de carbonu»
Contenido eliminado Contenido añadido
m iguo testu: "of rede" => "of red" |
m iguo testu: Atles of => Atlas of |
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Llinia 96:
originally being twodimensional it was soon enhanced by suffixes, CH, CN, j and other features making it impractical for en-masse analyses of foreign galaxies, #
and it gradually occurred that the old R and N stars actually were two distinct types of carbon stars, having real astrophysical significance.
A new revised Morgan-Keenan classification was published in 1993 by [[Philip Keenan]], defining the classes: C-N, C-R and C-H. Later the classes C-J and C-Hd were added. <ref>[http://adsabs.harvard.edu/cgi-bin/bib_query?1993PASP..105..905K Revised MK spectral classification of the rede carbon stars - Keenan, Philip C.]</ref> This constitutes the established classification system used today <ref>[http://web.archive.org/web/http://adc.astro.umd.edu/adc-cgi/cat.pl?/journal_tables/ApJS/105/419/ Spectral
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