The Araucaria project: eclipsing binaries in SMC Virtual Observatory Resource

Authors
  1. Graczyk D.
  2. Pietrzynski G.
  3. Thompson I.B.
  4. Gieren W.
  5. Pilecki B.,Konorski P.
  6. Udalski A.
  7. Soszynski I.
  8. Villanova S.
  9. Gorski M.,Suchomska K.
  10. Karczmarek P.
  11. Kudritzki R.-P.
  12. Bresolin F.
  13. Gallenne A.
  14. Published by
    CDS
Abstract

We present a distance determination to the Small Magellanic Cloud (SMC) based on an analysis of four detached, long-period, late-type eclipsing binaries discovered by the Optical Gravitational Lensing Experiment (OGLE) survey. The components of the binaries show negligible intrinsic variability. A consistent set of stellar parameters was derived with low statistical and systematic uncertainty. The absolute dimensions of the stars are calculated with a precision of better than 3%. The surface brightness-infrared color relation was used to derive the distance to each binary. The four systems clump around a distance modulus of (m - M) = 18.99 with a dispersion of only 0.05 mag. Combining these results with the distance published by Graczyk et al. for the eclipsing binary OGLE SMC113.3 4007, we obtain a mean distance modulus to the SMC of 18.965+/-0.025 (stat.)+/-0.048 (syst.) mag. This corresponds to a distance of 62.1+/-1.9 kpc, where the error includes both uncertainties. Taking into account other recent published determinations of the SMC distance we calculated the distance modulus difference between the SMC and the Large Magellanic Cloud equal to 0.458+/-0.068 mag. Finally, we advocate {mu}_SMC_= 18.95+/-0.07 as a new "canonical" value of the distance modulus to this galaxy.

Keywords
  1. magellanic-clouds
  2. eclipsing-binary-stars
  3. late-type-stars
  4. photometry
  5. radial-velocity
Bibliographic source Bibcode
2014ApJ...780...59G
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/780/59
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/780/59
Document Object Identifer DOI
doi:10.26093/cds/vizier.17800059

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History

2015-01-30T07:24:58Z
Resource record created
2015-01-30T07:24:58Z
Created
2017-10-13T15:41:35Z
Updated

Contact

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CDS support team
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