A S Binks
The Gaia-ESO survey: A lithium depletion boundary age for NGC 2232
Binks, A S; Jeffries, Robin D; Jackson, Richard J; Franciosini, E; Sacco, G G; Bayo, A; Magrini, L; Randich, S; Arancibia-Silva, J; Bergemann, M; Bragaglia, A; Gilmore, G; Gonneau, A; Hourihane, A; Jofré, P; Korn, A J; Morbidelli, L; Prisinzano, L; Worley, C C; Zaggia, S
Authors
Robin Jeffries r.d.jeffries@keele.ac.uk
Richard J Jackson
E Franciosini
G G Sacco
A Bayo
L Magrini
S Randich
J Arancibia-Silva
M Bergemann
A Bragaglia
G Gilmore
A Gonneau
A Hourihane
P Jofré
A J Korn
L Morbidelli
L Prisinzano
C C Worley
S Zaggia
Abstract
Astrometry and photometry from {\it Gaia} and spectroscopic data from the {\it Gaia}-ESO Survey (GES) are used to identify the lithium depletion boundary (LDB) in the young cluster NGC 2232. A specialised spectral line analysis procedure was used to recover the signature of undepleted lithium in very low luminosity cluster members. An age of $38\pm 3$ Myr is inferred by comparing the LDB location in absolute colour-magnitude diagrams (CMDs) with the predictions of standard models. This is more than twice the age derived from fitting isochrones to low-mass stars in the CMD with the same models. Much closer agreement between LDB and CMD ages is obtained from models that incorporate magnetically suppressed convection or flux-blocking by dark, magnetic starspots. The best agreement is found at ages of $45-50$\,Myr for models with high levels of magnetic activity and starspot coverage fractions $>50$ per cent, although a uniformly high spot coverage does not match the CMD well across the full luminosity range considered.
Journal Article Type | Article |
---|---|
Acceptance Date | May 3, 2021 |
Online Publication Date | May 12, 2021 |
Publication Date | 2021-07 |
Publicly Available Date | Mar 29, 2024 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Publisher | Oxford University Press |
Peer Reviewed | Peer Reviewed |
Volume | 505 |
Issue | 1 |
Pages | 1280-1292 |
Keywords | stars: kinematics and dynamics, stars: late-type, stars: pre-main-sequence, solar neighbourhood |
Publisher URL | https://academic.oup.com/mnras/article/505/1/1280/6274699?login=true |
Files
2105.01153v1.pdf
(3.7 Mb)
PDF
Publisher Licence URL
https://creativecommons.org/licenses/by/4.0/
stab1351.pdf
(4.6 Mb)
PDF
Publisher Licence URL
https://creativecommons.org/licenses/by/4.0/
You might also like
The Gaia-ESO Survey: Homogenisation of stellar parameters and elemental abundances
(2023)
Journal Article
The Gaia-ESO Survey: Preparing the ground for 4MOST and WEAVE galactic surveys
(2023)
Journal Article
The Gaia-ESO Survey: Lithium measurements and new curves of growth
(2022)
Journal Article
The structure and 3D kinematics of vela OB2
(2022)
Journal Article
Downloadable Citations
About Keele Repository
Administrator e-mail: research.openaccess@keele.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search