Contamination of the Th II line and the age of the Galaxy

THE age of the Galaxy may be estimated from observations of the ratio of stellar abundances of thorium, which has only one long-lived isotope with a half-life comparable to the suspected age of the Galaxy, and neodymium, a stable element. The Th/Nd abundance ratio in a sample of G-dwarf stars of dif...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Nature (London) 1990-08, Vol.346 (6285), p.635-637
Hauptverfasser:	Lawler, J. E, Whaling, W, Grevesse, N
Format:	Artikel
Sprache:	eng
Schlagworte:	Abundance Age Astronomical models Astronomy Characteristics and properties of the milky way Chemical evolution Contamination Dwarf stars Earth, ocean, space Evolution Exact sciences and technology Galactic evolution Galaxies Humanities and Social Sciences Lasers letter Lifetime multidisciplinary Neodymium Organic chemistry Radiative lifetime Ratios Science Science (multidisciplinary) Stellar age Stellar systems. Galactic and extragalactic objects and systems. The universe Thorium Transition probabilities
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Schreiben Sie den ersten Kommentar!