On the origin of a rotating metal-poor stellar population in the Milky Way Nuclear Cluster

Sedda, Manuel Arca, Gualandris, Alessia, Do, Tuan, Feldmeier-Krause, Anja, Neumayer, Nadine and Erkal, Denis (2020) On the origin of a rotating metal-poor stellar population in the Milky Way Nuclear Cluster Astrophysical Journal Letters.

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Abstract

We explore the origin of a population of stars recently detected in the inner parsec of the Milky Way Nuclear Cluster (NC), which exhibit sub-solar metallicity and a higher rotation compared to the dominant population. Using state-of-the-art N-body simulations, we model the infall of massive stellar systems into the Galactic center, both of Galactic and extra-galactic origin. We show that the newly discovered population can either be the remnant of a massive star cluster formed a few kpc away from the Galactic center (Galactic scenario) or be accreted from a dwarf galaxy originally located at 10-100 kpc (extragalactic scenario) and that reached the Galactic center 3

Item Type:	Article
Divisions :	Faculty of Engineering and Physical Sciences > Physics
Authors :	Name Email ORCID Sedda, Manuel Arca Gualandris, Alessia a.gualandris@surrey.ac.uk Do, Tuan Feldmeier-Krause, Anja Neumayer, Nadine Erkal, Denis d.erkal@surrey.ac.uk
Date :	23 August 2020
Uncontrolled Keywords :	black holes - supermassive black holes - galactic nuclei - gravitational waves
Additional Information :	Embargo OK Metadata Pending
Depositing User :	James Marshall
Date Deposited :	25 Aug 2020 10:24
Last Modified :	25 Aug 2020 10:24
URI:	http://epubs.surrey.ac.uk/id/eprint/858491

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