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Observational hints of a real age spread in the young LMC star cluster NGC 1971

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Piatti, AE and Cole, A ORCID: 0000-0003-0303-3855 2017 , 'Observational hints of a real age spread in the young LMC star cluster NGC 1971' , Monthly Notices of the Royal Astronomical Society, vol. 470 , L77-L81 , doi: 10.1093/mnrasl/slx081.

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Abstract

We report that the serendipitous young Large Magellanic Cloud cluster NGC 1971 exhibits an extended main-sequence turn-off (eMSTO) possibly originated mostly by a real age spread. We used CT1 Washington photometry to produce a colour–magnitude diagram (CMD) with the fiducial cluster features. From its eMSTO, we estimated an age spread of ∼170 Myr (observed age range 100–280 Myr), once observational errors, stellar binarity, overall metallicity variations and stellar rotation effects were subtracted in quadrature from the observed age width.

Item Type: Article
Authors/Creators:Piatti, AE and Cole, A
Keywords: galaxies: individual, LMC - galaxies, star clusters: general - galaxies, star clusters: individual: NGC 1971
Journal or Publication Title: Monthly Notices of the Royal Astronomical Society
Publisher: Blackwell Publishing Ltd
ISSN: 0035-8711
DOI / ID Number: 10.1093/mnrasl/slx081
Copyright Information:

Copyright 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

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