Journal Article

Intermediate old star clusters in a young starburst: the case of NGC 5253

D. Harbeck, J. Gallagher and D. Crnojević

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 422, issue 1, pages 629-636
Published in print May 2012 | ISSN: 0035-8711
Published online April 2012 | e-ISSN: 1365-2966 | DOI: https://dx.doi.org/10.1111/j.1365-2966.2012.20640.x
Intermediate old star clusters in a young starburst: the case of NGC 5253

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We investigate the star cluster population in the outer parts of the starburst galaxy NGC 5253 using archive images taken with the Hubble Space Telescope’s Advanced Camera for Surveys. Based on the F415W, F555W and F814W photometry ages and masses are estimated for bona fide star cluster candidates. We find three potentially massive (≥105 M) star clusters at ages of the order of 1–2 Gyr, implying, if confirmed, a high global star formation rate in NGC 5253 during that epoch. This result underlines earlier findings that the current starburst is just one episode in a very active dwarf galaxy.

Keywords: galaxies: dwarfs; galaxies: groups: individual: NGC 5253; galaxies: evolution; galaxies: starburst; galaxies: star clusters: general

Journal Article.  4270 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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