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[Y/Mg] stellar dating calibration

Published online by Cambridge University Press:  07 March 2018

A. Titarenko ,
A. Recio-Blanco ,
P. de Laverny ,
M. Hayden ,
G. Guiglion  and
C. Worley
A. Titarenko
Affiliation:
Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, France
A. Recio-Blanco
Affiliation:
Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, France
P. de Laverny
Affiliation:
Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, France
M. Hayden
Affiliation:
Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, France
G. Guiglion
Affiliation:
Leibniz-Institut fur Astrophysik Potsdam (AIP), 14482 Potsdam, Germany
C. Worley
Affiliation:
Institute of Astronomy, University of Cambridge (IOA), Cambridge, United Kingdom
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Abstract

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Gaia DR1 has opened a new era of stellar age dating, that is crucial for many astrophysical objectives. In addition, the Gaia based isochrone fitting ages can be compared to other chemical clocks like the [Y/Mg] one (Nissen et al. 2015). In our work we have used ESO archived data of the AMBRE project (de Laverny et al. 2013) for UVES spectra, in order to evaluate the age [Y/Mg] abundance correlation for turn off stars. 310 turn off stars of the UVES-archive (setups 564 and 580) are included in the TGAS database. Isochrone fitting ages were derived. We have applied the GAUGUIN procedure for those stars to derive the Mg and the Y abundances. As the result we present the [Y/Mg] vs stellar age dependence for ~40 TO-stars.

Keywords

stars: abundancesatmospheres
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S330: Astrometry and Astrophysics in the Gaia sky , April 2017 , pp. 267 - 268
Copyright
Copyright © International Astronomical Union 2018 

References

Nissen, P. E., 2015, Astronomy & Astrophysics, 579, A52 Google Scholar
Tucci, et al., 2016, Astronomy & Astrophysics, 590, A32 Google Scholar
Laverny, et al. 2013, The Messenger, 153Google Scholar
Guiglion, et al., 2016, Astronomy & Astrophysics, 595, A18 Google Scholar
Jofre, et al., 2015, Astronomy & Astrophysics, 582, A81 Google Scholar
Mikolaitis, et al., 2017, Astronomy & Astrophysics, 600, A22 Google Scholar