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http://hdl.handle.net/20.500.12386/24342
Titolo: | Multiple stellar populations in the globular cluster M3 (NGC 5272): a Strömgren perspective | Autori: | MASSARI, DAVIDE Lapenna, Emilio BRAGAGLIA, Angela Dalessandro, Emanuele Contreras Ramos, Rodrigo Amigo, Pía |
Data pubblicazione: | 2016 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 458 | Fascicolo: | 4 | Da pagina:: | 4162 | Abstract: | We present Strömgren photometry of the Galactic Globular Cluster M3 to study its multiple generations phenomenon. The use of different colour-magnitude diagrams (CMDs) and especially of the notoriously efficient c<SUB>y</SUB> index allowed us to detect a double red giant branch in the cluster CMD. After decontamination from fore- and background sources, the two sequences turned out to be equally populated. The two components also show a bimodal radial distribution well corresponding to that predicted by numerical simulations for clusters living in an intermediate dynamical evolutive state and with a population with modified chemical composition that was born more centrally concentrated than the primordial. The analysis of high-resolution spectra quantitatively demonstrates that the two detected sequences correspond to the first (Na-poor) generation and the second (Na-rich) generation, thus confirming the importance of synergy between photometry and spectroscopy. | URI: | http://hdl.handle.net/20.500.12386/24342 | URL: | https://academic.oup.com/mnras/article/458/4/4162/2613855 | ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stw583 | Bibcode ADS: | 2016MNRAS.458.4162M | Fulltext: | open |
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