6533b872fe1ef96bd12d314c
RESEARCH PRODUCT
The Gaia-ESO Survey: evidence of atomic diffusion in M67?
Maurizio SalarisG. G. SaccoC. Bertelli MottaArnas DrazdauskasL. MorbidelliEva K. GrebelGerard GilmoreAnna PasqualiA. C. LanzafameJack LewisAmelia BayoFrancesco DamianiLorenzo MonacoThomas BensbyS. G. SousaPaula JofrePaula JofreSergey E. KoposovSergey E. KoposovUlrike HeiterRodolfo SmiljanicEmilio J. AlfaroCarmela LardoSarah L. MartellAngela BragagliaG. MichaudGrazina TautvaisieneS. ZaggiaM. T. CostadoAndreas KornGiovanni CarraroE. FranciosiniS. Blanco-cuaresmaClare WorleyX. FuX. FuLaura MagriniJ. RicherSofia RandichV. AdibekyanEttore FlaccomioA. HourihaneAndrew R. Caseysubject
astro-ph.SRstars: abundancesastro-ph.GAMetallicityFOS: Physical sciencesAstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesevolution [Galaxy]Astronomi astrofysik och kosmologi0103 physical sciencesAstronomy Astrophysics and CosmologyAstrophysics::Solar and Stellar Astrophysicsstars: evolution010303 astronomy & astrophysicsStellar evolutionSolar and Stellar Astrophysics (astro-ph.SR)Astrophysics::Galaxy AstrophysicsPhysicsGalaxy: evolution010308 nuclear & particles physicsSubgiantMolecular cloudGalaxy: Abundanceabundances [Galaxy]Astronomy and AstrophysicsAstrophysics - Astrophysics of GalaxiesGalaxyInterstellar mediumStars: Abundanceabundances [stars]StarsAstrophysics - Solar and Stellar AstrophysicsSpace and Planetary ScienceAstrophysics of Galaxies (astro-ph.GA)evolution [stars]Galaxy: Abundances; Galaxy: Evolution; Stars: Abundances; Stars: Evolution; Astronomy and Astrophysics; Space and Planetary ScienceGalaxy: abundancesAstrophysics::Earth and Planetary AstrophysicsOpen clusterdescription
Investigating the chemical homogeneity of stars born from the same molecular cloud at virtually the same time is very important for our understanding of the chemical enrichment of the interstellar medium and with it the chemical evolution of the Galaxy. One major cause of inhomogeneities in the abundances of open clusters is stellar evolution of the cluster members. In this work, we investigate variations in the surface chemical composition of member stars of the old open clusterM67 as a possible consequence of atomic diffusion effects taking place during the main-sequence phase. The abundances used are obtained from high-resolution UVES/FLAMES spectra within the framework of the Gaia-ESO Survey. We find that the surface abundances of stars on the main sequence decrease with increasing mass reaching a minimum at the turn-off. After deepening of the convective envelope in subgiant branch stars, the initial surface abundances are restored.We found themeasured abundances to be consistent with the predictions of stellar evolutionary models for a cluster with the age and metallicity of M67. Our findings indicate that atomic diffusion poses a non-negligible constraint on the achievable precision of chemical tagging methods.© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-07-01 |