Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/29176
Title: | The star formation history of the Sculptor dwarf spheroidal galaxy | Authors: | Bettinelli, M. Hidalgo, S. L. CASSISI, Santi Aparicio, A. Piotto, G. Valdes, F. Walker, A. R. |
Issue Date: | 2019 | Journal: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Number: | 487 | Issue: | 4 | First Page: | 5862 | Abstract: | We present the star formation history (SFH) of the Sculptor dwarf spheroidal galaxy based on deep g, r photometry taken with Dark Energy Camera at the Blanco telescope, focusing our analysis on the central region of the galaxy extended up to ∼3 core radii. We have investigated how the SFH changes radially, subdividing the sampled area into four regions, and have detected a clear trend of star formation. All the SFHs show a single episode of star formation, with the innermost region presenting a longer period of star formation of ∼1.5 Gyr and for the outermost region the main period of star formation is confined to ∼0.5 Gyr. We observe a gradient in the mean age which is found to increase going towards the outer regions. These results suggest that Sculptor continued forming stars after the reionization epoch in its central part, while in the peripheral region, the majority of stars probably formed during the reionization epoch and soon after its end. From our analysis, Sculptor cannot be considered strictly as a fossil of the reionization epoch. | URI: | http://hdl.handle.net/20.500.12386/29176 | URL: | https://academic.oup.com/mnras/article/487/4/5862/5520829 | ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stz1679 | Bibcode ADS: | 2019MNRAS.487.5862B | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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stz1679.pdf | pdf editoriale | 5.05 MB | Adobe PDF | View/Open |
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