Globular cluster studies suggest that a signature in the spectra of RGB stars in a globular cluster are anti-correlations in Mg-Al and Na-O. In this work, a small sample of 12 RGB stars of the globular cluster M30 is investigated using VLT-UVES high-resolution spectrograph. I use photometric stellar parameters to derive the abundances of Fe, Na, Al and Mg in SIU – a visual spectral analysis tool using 1-dimensional hydrostatic plane parallel MAFAGS atmospheres assuming mixing length convection and treating line formation in LTE. We found signatures of Mg-Al anti-correlation in M30 with the majority of the stars belonging to the intermediate polluted group. Oxygen couldn’t be measured but an indirect clue to the Na-O anti-correlation is found due to the direct correlation of Al-Na. These results are consistent with recent studies of other globular clusters.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:uu-350861 |
| Date | January 2018 |
| Creators | Kilian Hikaru, Scheutwinkel |
| Publisher | Uppsala universitet, Observationell astrofysik |
| Source Sets | DiVA Archive at Upsalla University |
| Language | English |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | FYSAST ; FYSPROJ1096 |
Page generated in 0.0025 seconds