Calibrating the lithium-age relation and its dependence with rotation, activity and metallicity using open clusters and associations
Creators
- 1. Departamento de Física de la Tierra y Astrofísica and IPARCOS-UCM
- 2. UCM, CAB
- 3. IAC, Universidad de la Laguna (Tenerife)
- 4. INAF Catania
- 5. Nicolaus Copernicus Astronomical Center
- 6. Department of Physics and Astronomy, Uppsala University
- 7. INAF Arcetri
- 8. Institute of Astronomy, University of Cambridge
Description
In this work we use a series of open clusters and associations observed by the Gaia-ESO Survey (GES) to study the use of lithium abundances (Li I spectral line at 6708 Å) as an age indicator for pre- and main-sequence FGKM late-type stars. Previous studies of open clusters have shown that lithium depletion is not only strongly age dependent, but also shows a complex pattern with several other parameters, such as rotation, chromospheric activity and metallicity. Using the available data from both GES iDR6 and Gaia EDR3, we performed a thorough membership analysis and obtained lists of candidate members for 41 open clusters, ranging in age from 1-3 Myr to 5 Gyr. We then conducted a comparative study that allowed us to quantify the observable lithium dispersion in each cluster and study influence of rotation, activity and metallicity in the lithium dispersion of the selected candidates. All this allows us to calibrate a Li-age relation and create empirical lithium envelopes for several clusters in our sample.
Files
Gaia2021_MLGutiérrezAlbarrán_slides.pdf
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Additional details
References
- Gilmore et al 2012 (https://ui.adsabs.harvard.edu/abs/2012Msngr.147...25G/abstract)
- Bressan et al 2012 (https://ui.adsabs.harvard.edu/abs/2012MNRAS.427..127B/abstract)
- Gaia Collaboration et al 2021 (https://ui.adsabs.harvard.edu/abs/2021A%26A...649A...1G/abstract)
- Montes et al 2001 (https://ui.adsabs.harvard.edu/abs/2001A%26A...379..976M/abstract)
- Gutiérrez Albarrán et al 2020 (https://ui.adsabs.harvard.edu/abs/2020A%26A...643A..71G/abstract)
- Baraffe et al 2015 (https://ui.adsabs.harvard.edu/abs/2015A%26A...577A..42B/abstract)