Beryllium in Alpha Centauri A and constraints on Beryllium formation

Details Beryllium in Alpha Centauri A and constraints on Beryllium formation Beryllium in Alpha Centauri A and constraints on Beryllium formation

Mar 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....55..463d&link_type=abstract

Astronomy and Astrophysics, vol. 55, no. 3, Mar. 1977, p. 463-467. Research supported by the Statens Naturvetenskapliga Forskni

Astronomy and Astrophysics

Astrophysics

13

Beryllium, Stellar Evolution, Stellar Spectra, Abundance, Hydrogen, Nuclear Fusion, Spectral Line Width

Scientific paper

The equivalent width of the Be II 313.1-nm line in Alpha Cen A (G2 V) is determined to be 1.25 times the solar value, leading to a Be/H abundance ratio of 2.5 by 10 to the -11th power. The age of Alpha Cen A is estimated to 8 billion years. This, together with observed Be in the old stars Delta Eri (K0 IV) and Mu Her A (G5 IV), indicates that beryllium existed in significant amounts relatively early in the history of the Galaxy.

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