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  4. An extragalactic chromosome map: the intermediate-age SMC cluster Lindsay 1
 
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research article

An extragalactic chromosome map: the intermediate-age SMC cluster Lindsay 1

Saracino, S.
•
Bastian, N.
•
Kozhurina-Platais, V
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October 1, 2019
Monthly Notices Of The Royal Astronomical Society

The discovery of star-to-star abundance variations (a.k.a. multiple populations - MPs) within globular clusters (GCs), which are generally not found in the field or in lower mass open clusters, has led to a search for the unique property of GCs that allow them to host this phenomenon. Recent studies have shown that MPs are not limited to the ancient GCs but are also found in massive clusters with ages down to (at least) 2 Gyr. This finding is important for understanding the physics of the MP phenomenon, as these young clusters can provide much stronger constraints (e.g. on potential age spreads within the clusters) than older ones. However, a direct comparison between ancient GCs and intermediate clusters has not yet been possible due to the different filters adopted in their studies. Here we present new Hubble Space Telescope UV photometry of the 7.5 Gyr, massive Small Magellanic Cloud cluster, Lindsay 1, in order to compare its pseudo colour-colour diagram to that of Galactic GCs. We find that they are almost identical and conclude that the MPs phenomenon is the same, regardless of cluster age and host galaxy.

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Type
research article
DOI
10.1093/mnrasl/slz135
Web of Science ID

WOS:000491355100018

Author(s)
Saracino, S.
•
Bastian, N.
•
Kozhurina-Platais, V
•
Cabrera-Ziri, I
•
Dalessandro, E.
•
Kacharov, N.
•
Lardo, C.  
•
Larsen, S. S.
•
Mucciarelli, A.
•
Platais, I
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Date Issued

2019-10-01

Publisher

OXFORD UNIV PRESS

Published in
Monthly Notices Of The Royal Astronomical Society
Volume

489

Issue

1

Start page

L97

End page

L101

Subjects

Astronomy & Astrophysics

•

techniques: photometric

•

galaxies: star clusters: individual: lindsay 1

•

galactic globular-clusters

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magellanic cloud clusters

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uv legacy survey

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multiple populations

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stellar populations

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supermassive stars

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abundance

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search

•

ii.

•

astrometry

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LASTRO  
Available on Infoscience
November 1, 2019
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/162625
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