Le 27 février 2018
De 12h45 à 13h45

Andrea Rojas (ObAS)   "Modeling optical and UV polarization of AGNs"   The structure and...

Du 18 juin 2018 au 22 juin 2018
Strasbourg, France

"The co-evolution of galaxies and the intergalactic medium during the first billion years of the...

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The evolution of Galactic globular clusters: inspirals and mergers

Le 2 février 2018
De 10h30 à 12h00

Alessandra Mastrobuono-Battisti

MPIA

 

Globular clusters (GCs), for long considered single stellar populations, recently revealed their real complex nature. Most of them, if not all, indeed host multiple stellar populations and few very massive ones seem to show star-by-star spreads in iron content. In this seminar I will take a journey following the orbital and internal chemo-dynamical evolution of Galactic globular clusters, from their birth place down to the Galactic nucleus. By means of detailed N-body simulations, I will illustrate how they can interact and strip material from each other, or even merge, to produce the observed metallicity spreads. The most massive and dense GCs survive the Galactic tidal force and, because of dynamical friction, they decay to the Galactic centre. As I will show, these GCs, finally arrived at the end of their journey, could contribute to the formation of the central nuclear star cluster.

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