VMC survey. XXVI. SMC RR Lyrae stars Virtual Observatory Resource

Authors
  1. Muraveva T.
  2. Subramanian S.
  3. Clementini G.
  4. Cioni M.-R.L.
  5. Palmer M.,Van Loon J.T.
  6. Moretti M.I.
  7. De Grijs R.
  8. Molinaro R.
  9. Ripepi V.,Marconi M.
  10. Emerson J.
  11. Ivanov V.D.
  12. Published by
    CDS
Abstract

We present results from the analysis of 2997 fundamental mode RR Lyrae variables located in the Small Magellanic Cloud (SMC). For these objects, near-infrared time series photometry from the VISTA survey of the Magellanic Clouds system (VMC) and visual light curves from the OGLE IV (Optical Gravitational Lensing Experiment IV) survey are available. In this study, the multi-epoch Ks-band VMC photometry was used for the first time to derive intensity-averaged magnitudes of the SMC RR Lyrae stars. We determined individual distances to the RR Lyrae stars from the near-infrared period-absolute magnitude-metallicity (PM_Ks_Z) relation, which has some advantages in comparison with the visual absolute magnitude-metallicity (M_V_-[Fe/H]) relation, such as a smaller dependence of the luminosity on interstellar extinction, evolutionary effects and metallicity. The distances we have obtained were used to study the three-dimensional structure of the SMC. The distribution of the SMC RR Lyrae stars is found to be ellipsoidal. The actual line-of-sight depth of the SMC is in the range 1-10kpc, with an average depth of 4.3+/-1.0kpc. We found that RR Lyrae stars in the eastern part of the SMC are affected by interactions of the Magellanic Clouds. However, we do not see a clear bimodality observed for red clump stars, in the distribution of RR Lyrae stars.

Keywords
  1. Magellanic Clouds
  2. Variable stars
  3. Photometry
Bibliographic source Bibcode
2018MNRAS.473.3131M
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/473/3131
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/473/3131

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/473/3131
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/473/3131
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/473/3131
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/MNRAS/473/3131/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/473/3131/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/473/3131/table1?

History

2021-02-10T15:04:04Z
Resource record created
2021-02-10T15:04:04Z
Created
2021-09-10T12:40:28Z
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