Speaker
Description
One of the remaining unsolved questions is the one of globular cluster formation, as there is still no definite consensus on whether the clusters have formed within the Milky Way galaxy (in situ) or have been accreted. Current estimates suggest that between 25-65% of all Milky Way GCs were accreted, however the exact number is still uncertain. Since GCs are significantly old (up to 12 Gyr), determining their place of origin will provide information about the early stages of Milky Way history.
In our study we aimed to determine their origin by deriving their chemical abundances from the integrated light spectra. We observed 8 hardly studied GCs with the recently deployed WEAVE Large Integral Field Unit with spectral resolution of R ~ 10 000. WEAVE is a multi-object fiber spectrograph installed on the William Herschel Telescope, and it can simultaneously obtain up to a thousand spectra. Our sample covers a range of metallicities, locations in the Milky Way and presence of tidal features. From the integrated light spectra we determined the abundances of [Fe/H] and alpha-elements, and compared them to the abundances of the individual stars.
| Talk category | NOVA Network 1 |
|---|---|
| Preference for a talk or poster | Talk |
