Now showing items 1-2 of 2
ESPRESSO highlights the binary nature of the ultra-metal-poor giant HE 0107-5240
(EDP Sciences, 2020)
Context. The vast majority of the known stars of ultra low metallicity ([Fe=H] >-4:5) are known to be enhanced in carbon, and belong to the 'low-carbon band' (A(C) = log(C=H) + 12 7:6). It is generally, although not ...
A Study of the Blue Straggler Population of the Old Open Cluster Collinder 261
(Institute of Physics Publishing, 2020-02)
Blue stragglers (BSs) are stars located in an unexpected region of the color–magnitude diagram (CMD) of a stellar population, as they appear bluer and more luminous than the stars in the turn-off region. They are ubiquitous, ...