Spite Plateau
Big Bang
Herausgegeben: Valère Kresten, Proteus
Versandkostenfrei!
Versandfertig in 6-10 Tagen
30,99 €
inkl. MwSt.
PAYBACK Punkte
15 °P sammeln!
The Spite plateau (or Spite lithium plateau) is a baseline in the abundance of lithium found in old stars orbiting the galactic halo. It was named after the astronomers François and Monique Spite, who published the discovery in 1982. The element lithium was first produced during the Big Bang that created the observable universe. The cosmic abundance of lithium is of interest because it provides several constraints to the various Big Bang models. Those models that fail to satisfy these constraints are therefore subject to rejection or correction by the scientific community. Lithium is readily ...
The Spite plateau (or Spite lithium plateau) is a baseline in the abundance of lithium found in old stars orbiting the galactic halo. It was named after the astronomers François and Monique Spite, who published the discovery in 1982. The element lithium was first produced during the Big Bang that created the observable universe. The cosmic abundance of lithium is of interest because it provides several constraints to the various Big Bang models. Those models that fail to satisfy these constraints are therefore subject to rejection or correction by the scientific community. Lithium is readily consumed by fusion with protons at temperatures above 2 × 106 K, such as is found in the cores of stars. Thus, if the convection zone of a main sequence star carries lithium to the core region, the abundance of lithium in the star can decrease. Likewise, lithium can be produced in interstellar matter by spallation collisions with cosmic rays, or by the evolution of stars of moderate mass.
Andere Kunden interessierten sich für
