Sentences with phrase «metal abundance»
The phrase "metal abundance" refers to the amount or concentration of metals present in a particular substance or environment. It is used to describe the relative quantity of elements like iron, copper, gold, or silver in relation to other elements or compounds. Full definition
The overall heavy - metal abundance of the galaxy does change over billions of years as stars process lighter elements into heavier ones and recycle them back into star forming material at the end of their lives.
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From that signature, the team inferred that the exoplanet's atmospheric heavy metal abundance is only four to five times as much as the sun's.
Because the stars of the binary system violate the relation between age and metal abundance which holds in our Galaxy, Preston believes that it came from somewhere else.
These stars contain a very low metals abundance relative to the sun (with a mean around two percent of Sol's).
«You are looking for that sweet spot,» says Fred Adams of the University of Michigan, «where you are not so close to the center that conditions are hostile and not so far out that the metal abundance is too low.»
Stars in globular clusters, however, have less than a tenth the metal abundance of the sun.