ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] Calculations show that in old halo B stars most helium will have diffused below the photosphere and therefore will not be detected spectroscopically. This may account for the low abundances of helium observed in these ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/213871a0