Speaker
Sergio Ortolani
(University of Padova)
Description
We present an updated isochrone age determination of a sub-sample of stars among the halo field stars nearest to the Sun. We use revised parallaxes and reddening estimations based on a detailed study of the local interstellar dust and confirmed by independent diagnostics. The age determination is based on isochrone fitting with a standard technique already used for halo globular clusters. Comparisons with previous investigations on the same sub-sample of stars are performed. We briefly discuss also the main possible shortcomings in the age determination of field stars that could affect the final results.
Primary author
Sergio Ortolani
(University of Padova)
Co-authors
Adriano Pietrinferni
(INAF Osservatorio Astronomico Teramo, Italy)
Maurizio Salaris
(Astrophysics Research Institute, Liverpool John Moores University, Liverpool, UK)
Santi Cassisi
(INAF Osservatorio Astronomico di Teramo, Italy)
