The use of FDU–-age relations obtained from independent sets of stellar evolution calculations cause age differences (for a given FDU and pair) up to ~2 Gyr. Our calibration is compared with a small sample of available measurements of FDU in star clusters and halo field stars, which at least qualitatively confirm the overall trend of the predicted FDU with age and. α-enhanced), efficiency of overshooting from MS convective cores and from the convective envelopes, variations in the initial He abundance and in the mixing length parameter. We provide a theoretical calibration of FDU in terms of total metallicity and age, for ages greater than ~1 Gyr, which we tested against variations in the initial heavy element distribution (scaled-solar vs. FDU cannot give accurate ages for individual stars, but may provide a general chronology for the formation of composite populations and add constraints to analyses of red giants from surface gravity-effective temperature diagrams. We performed a detailed analysis of the use of measured in red giant branch stars between the completion of the first dredge up and the red giant branch bump ( FDU) as age indicator. Maggini, 64100 Teramo, ItalyĮ-mail: Instituto de Astrofísica de Canarias, Calle via Lactea s/n, 38205 La Laguna, Tenerife, Spain Piersimoni 2 and Santi Cassisi 2 ,3ġ Astrophysics Research Institute, Liverpool John Moores University, IC2, Liverpool Science Park, 146 Brownlow Hill, Liverpool 元 5RF UKĮ-mail: INAF−Osservatorio Astronomico di Collurania, via M. Maurizio Salaris 1, Adriano Pietrinferni 2, Anna M. ![]() Astronomical objects: linking to databases.Including author names using non-Roman alphabets.Suggested resources for more tips on language editing in the sciences Punctuation and style concerns regarding equations, figures, tables, and footnotes
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