Ages of star clusters in SMC Virtual Observatory Resource

Authors
  1. Bitsakis T.
  2. Gonzalez-Lopezlira R.A.
  3. Bonfini P.
  4. Bruzual G.
  5. Maravelias G.,Zaritsky D.
  6. Charlot S.
  7. Ramirez-Siordia V.H.
  8. Published by
    CDS
Abstract

We present a new study of the spatial distribution and ages of the star clusters in the Small Magellanic Cloud (SMC). To detect and estimate the ages of the star clusters we rely on the new fully automated method developed by Bitsakis+ (2017, J/ApJ/845/56). Our code detects 1319 star clusters in the central 18deg^2^ of the SMC we surveyed (1108 of which have never been reported before). The age distribution of those clusters suggests enhanced cluster formation around 240Myr ago. It also implies significant differences in the cluster distribution of the bar with respect to the rest of the galaxy, with the younger clusters being predominantly located in the bar. Having used the same setup, and data from the same surveys as for our previous study of the LMC, we are able to robustly compare the cluster properties between the two galaxies. Our results suggest that the bulk of the clusters in both galaxies were formed approximately 300Myr ago, probably during a direct collision between the two galaxies. On the other hand, the locations of the young (<=50Myr) clusters in both Magellanic Clouds, found where their bars join the HI arms, suggest that cluster formation in those regions is a result of internal dynamical processes. Finally, we discuss the potential causes of the apparent outside-in quenching of cluster formation that we observe in the SMC. Our findings are consistent with an evolutionary scheme where the interactions between the Magellanic Clouds constitute the major mechanism driving their overall evolution.

Keywords
  1. magellanic-clouds
  2. open-star-clusters
  3. astronomical-object-identification
Bibliographic source Bibcode
2018ApJ...853..104B
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/853/104
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/853/104
Document Object Identifer DOI
doi:10.26093/cds/vizier.18530104

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/853/104
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/853/104
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/853/104
IVOA Table Access TAP
https://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).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/853/104/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/853/104/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/853/104/table1?

History

2018-12-11T15:50:52Z
Resource record created
2018-12-11T15:50:52Z
Created
2019-01-09T14:22:37Z
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