metallicity
[/ˌmetəˈlɪsɪti/]
nounfemininepl: metallicities
metalicidade
1. The abundance of heavy elements (metals) in a celestial object, typically measured relative to hydrogen and helium; the proportion of elements heavier than helium in a star or other astronomical body
The metallicity of this star indicates it formed from material enriched by previous stellar generations.
A metalicidade desta estrela indica que ela se formou a partir de material enriquecido por gerações estelares anteriores.
2. In astronomy and astrophysics, a parameter used to classify stars and galaxies based on their chemical composition
Low metallicity stars are often found in the galactic halo and are considered among the oldest objects in the universe.
Estrelas com baixa metalicidade são frequentemente encontradas no halo galáctico e são consideradas entre os objetos mais antigos do universo.
3. The degree to which a material or substance contains metal or metallic properties
The sample's metallicity was analyzed using spectroscopic techniques.
A metalicidade da amostra foi analisada usando técnicas espectroscópicas.
Metallicity is a technical term primarily used in astronomy and astrophysics. It is not part of everyday vernacular in either Brazilian Portuguese or English-speaking countries. The term is essential in scientific discourse about stellar evolution, galactic formation, and the chemical history of the universe. Brazilian astronomy programs and the Observatório Nacional do Brasil frequently use this terminology in research and education.
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