Surface Helium Abundance in Horizontal Branch and Halo B Stars

Details Surface Helium Abundance in Horizontal Branch and Halo B Stars Surface Helium Abundance in Horizontal Branch and Halo B Stars

Jul 1967

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1967natur.215...44f&link_type=abstract

Nature, Volume 215, Issue 5096, pp. 44-45 (1967).

Physics

17

Scientific paper

THE surface helium abundance of stars at the blue end of the horizontal branch in globular clusters and of halo B stars has been estimated by spectroscopists to be lower than that at the Sun's surface by factors ranging from 10 (refs. 1 and 2) to 100 (ref. 3). It is assumed that the halo B stars are the field-equivalents of horizontal branch stars, and we hereafter refer to both classes as blue horizontal branch stars.

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