![Image of the globular cluster M13, where second generation AGB stars have been identified for the first time. Image obtained with the IAC-80 Telescope, in the Teide Observatory (Tenerife). Credits: Daniel López/IAC. Image of the globular cluster M13, where second generation AGB stars have been identified for the first time. Image obtained with the IAC-80 Telescope, in the Teide Observatory (Tenerife). Credits: Daniel López/IAC.](/sites/default/files/styles/crop_square_2_2_to_320px/public/images/news/prensa1010_1646.jpg?itok=EjGgfjAj)
The specialized Journal The Astrophysical Journal Letters (ApJL) is publishing today, in its on-line version, a study led by the Institute of Astrophysics of the Canaries (IAC) in which the researchers have identified a type of giant stars (AGB which means Asymptotic Giant Branch) of the second generation, and rich in aluminium, in four globular clusters with a range of metallicities and ages in the Milky Way. The detection of these stars on the giant branch of the well known Hertzsprung-Russell (HR) diagram is what is expected according to theoretical models of stellar evolution, and
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