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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/25786
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- Young star clusters in the Large Magellanic Cloud: NGC 1805 and 1818
- Johnson, Rachel A.; Beaulieu, Sylvie F.; Gilmore, Gerry F.; Hurley, Jarrod R.; Santiago, Basilio X.; Tanvir, Nial R.; Elson, Rebecca A. W.
- We present colour-magnitude diagrams for two rich (approximate to 10(4) M.) Large Magellanic Cloud star clusters with ages approximate to 10(7) yr, constructed from optical and near-infrared data obtained with the Hubble Space Telescope. These data are part of an HST project to study LMC clusters with a range of ages. In this paper we investigate the massive star content of the young clusters, and determine the cluster ages and metallicities, paying particular attention to Be-star and blue-straggler populations and evidence of age spreads. We compare our data with detailed stellar-population simulations to investigate the turn-off structure of approximate to 25 Myr stellar systems, highlighting the complexity of the blue-straggler phenomenon.
- Publication type
- Journal article
- Monthly Notices of the Royal Astronomical Society, Vol. 324, no. 2 (June 2001), p. 367-380
- Publication year
- Be-star; Blue stragglers; CCD photometry; Emission-line stars; Galaxies; Hubble Space Telescope; Initial mass function; Magellanic Clouds; NGC-1818; Star clusters; Stellar evolution; WFPC2
- Publisher URL
- Copyright © 2001 the authors. Journal compilation copyright © 2001 Royal Astronomical Society. The accepted manuscript of the paper is reproduced here in accordance with the copyright policy of the publisher. The definitive publication is available at www.interscience.wiley.com.
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- Peer reviewed