U-SMAC I. UV catalog of SMC-Shell region Virtual Observatory Resource

Authors
  1. Hota S.
  2. Subramaniam A.
  3. Dhanush S.R.
  4. Cioni M.-R.L.
  5. Subramanian S.
  6. Published by
    CDS
Abstract

The interactions between the Magellanic Clouds significantly affect the shape and distribution of the young stellar population, particularly in the periphery of the Small Magellanic Cloud (SMC). We present the first far-UV (FUV) map of the north-east SMC-Shell region using the Ultra Violet Imaging Telescope (UVIT) onboard AstroSat. The detected FUV stars are combined with Gaia Early Data Release 3 data to create a FUV-optical catalogue of ~14400 stars. FUV-optical colour-magnitude diagrams are used along with isochrones to estimate the stellar ages. The detected stars are formed in multiple episodes. We identified two episodes of star formation (~60 and ~260Myr ago), where the episode at ~260Myr is linked to the recent interaction with the Large Magellanic Cloud (LMC) and the episode at ~60Myr is linked to the pericentric passage of the SMC around our Galaxy. The median proper motion (PM) and velocity dispersion are found to be similar to the SMC main body, indicating that this region has not experienced significant tidal effects. The FUV stellar surface density and the dispersion in PM suggest that the extent of the inner SMC in the north-east direction to be around 2.2{deg}. We detect arm-like and arc-like structures in the FUV stellar density map, and their kinematics appear to be similar to the SMC main body. These extended outer features are the spatial stellar overdensities formed over multiple episodes of star formation, but without apparent kinematic distinction.

Keywords
  1. ultraviolet-astronomy
  2. galaxies
  3. photometry
  4. visible-astronomy
  5. dwarf-galaxies
  6. magellanic-clouds
Bibliographic source Bibcode
2024MNRAS.532..322H
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/532/322
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/532/322

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/532/322
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/532/322
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/532/322
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/MNRAS/532/322/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/532/322/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/532/322/table2?

History

2025-09-01T14:58:49Z
Resource record created
2025-09-01T14:58:49Z
Created
2025-09-02T11:47:38Z
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