Metallicitat
La metallicitat d'un objècte astronomic es la fraccion de sa massa qu'es pas compausada d'idrogèn ò d'èli. Quantifica l'importància dei procès de nucleosintèsi a l'origina de la matèria que constituís l'objècte considerat. Es generalament notada Z. La mesura de la metallicitat es sovent realizada per estudiar d'estelas car leis estelas ancianas an generalament una fraccion metallica febla.
Liames intèrnes
Bibliografia
- (en) Daniel Kunth e Göran Östlin, « The Most Metal-poor Galaxies », The Astronomy and Astrophysics Review, vol. 10, n° 1-2, junh 2000.
Nòtas e referéncias
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