SMC clusters age-dating & classification Virtual Observatory Resource

Authors
  1. Nayak P.K.
  2. Subramaniam A.
  3. Choudhury S.
  4. Sagar R.
  5. Published by
    CDS
Abstract

We aim to estimate the age and reddening parameters of already identified star clusters within the Small Magellanic Cloud (SMC) in a consistent way using available photometric data, classify them based on their mass and strength, and study their spatio-temporal distribution. We have used a semi-automated quantitative method, developed in the first paper of this series (Paper I), to estimate the cluster parameters using the V and I band photometric data from the Optical Gravitational Lensing Experiment (OGLE) III survey. We estimated parameters of 179 star clusters (17 are newly parameterised) and classified them into four groups. We present an online catalogue of parameters as well as cleaned and isochrone-fitted colour magnitude diagrams of 179 clusters. We compiled age information of 468 clusters by combining previous studies with our catalogue, to study their spatio-temporal distribution. Most of the clusters located in the southern part of the SMC are in the age range 600Myr-1.25Gyr, whereas, the clusters younger than 100Myr are mostly found in the northern SMC, with the central SMC showing continuous cluster formation. The peak of the cluster age distribution is identified at 130+/-35Myr, very similar to the Large Magellanic Cloud (LMC) in Paper I. We suggest that the burst of cluster formation at 130Myr is due to the most recent LMC-SMC interaction. 90% of the studied sample is found to have mass <1700M_{sun}_, suggesting that the SMC is dominated by low mass clusters. There is tentative evidence for compact clusters in the LMC when compared to those in the Galaxy and the SMC. A progressive shifting of cluster location from the south to north of the SMC is identified in last ~600Myr. The details of spatio-temporal distribution of clusters presented in two videos as part of this study can be used as a tool to constrain details of the recent LMC-SMC interactions.

Keywords
  1. magellanic-clouds
  2. stellar-associations
Bibliographic source Bibcode
2018A&A...616A.187N
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/616/A187
IVOA Identifier IVOID
ivo://CDS.VizieR/J/A+A/616/A187
Document Object Identifer DOI
doi:10.26093/cds/vizier.36160187

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/616/A187
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/616/A187
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/616/A187
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/616/A187/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/616/A187/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/616/A187/table2?

History

2018-09-12T10:38:16Z
Resource record created
2018-09-12T10:38:16Z
Created
2018-09-28T08:52:33Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr